Buffer over-read in PostgreSQL function pg_restore_attribute_stats() accepts array values of unmatched length, which causes query planning to read past end of one array. This allows a table maintainer to infer memory values past that array end. Within major version 18, minor versions before PostgreSQL 18.4 are affected. Versions before PostgreSQL 18 are unaffected.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20901-1 advisory.

    This update for postgresql18 fixes the following issues

    Security issues:

    - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
    - CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
    - CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
    - CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
    - CVE-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
    - CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
    - CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
    - CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
    - CVE-2026-6575: Detect faulty input when restoring attribute MCV statistics (bsc#1265180).
    - CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).
    - CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

    Non security issue:

    - Update to version 18.4.
    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer      to support immutable systems and transactional updates (jsc#PED-14820).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1780 advisory.

    Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use     search_path to find user-defined types, including extension-defined types.  That is to say, the victim     will execute arbitrary SQL functions of the attacker's choice.  Versions before PostgreSQL 18.4, 17.10,     16.14, 15.18, and 14.23 are affected. (CVE-2026-6472)

    Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause     the server to undersize an allocation and write out-of-bounds.  This may execute arbitrary code as the     operating system user running the database.  In applications that pass gigabyte-scale user inputs to the     relevant database functions, the application input provider may achieve a segmentation fault.  Versions     before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6473)

    Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve     portions of server memory, via crafted timezone zones.  Versions before PostgreSQL 18.4, 17.10, 16.14,     15.18, and 14.23 are affected. (CVE-2026-6474)

    Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to     overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account.  It will     remain the case that starting the server after these commands implicitly trusts the origin superuser, due     to features like shared_preload_libraries.  Hence, the attack has practical implications only if one takes     relevant action between these commands and server start, like moving the files to a different VM or     snapshotting the VM.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
    (CVE-2026-6475)

    SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to     execute arbitrary SQL as a superuser.  The attack takes effect when pg_createsubscriber next runs.  Within     major versions 17 and 18, minor versions before PostgreSQL 18.4 and 17.10 are affected.  Versions before     PostgreSQL 17 are unaffected. (CVE-2026-6476)

    Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(),     lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack     buffer with an arbitrarily-large response.  Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-     length, server-determined data into a buffer of unspecified size.  Because both the \lo_export command in     psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory.
    Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6477)

    Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker     to recover user credentials sufficient to authenticate.  This does not affect scram-sha-256 passwords, the     default in all supported releases.  However, current databases may have MD5-hashed passwords originating     in upgrades from PostgreSQL 13 or earlier.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and     14.23 are affected. (CVE-2026-6478)

    Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a     PostgreSQL AF_UNIX socket to achieve sustained denial of service.  If SSL and GSS are both disabled, an     attacker can do the same via access to a PostgreSQL TCP socket.  Versions before PostgreSQL 18.4, 17.10,     16.14, 15.18, and 14.23 are affected. (CVE-2026-6479)

    Buffer over-read in PostgreSQL function pg_restore_attribute_stats() accepts array values of unmatched     length, which causes query planning to read past end of one array.  This allows a table maintainer to     infer memory values past that array end.  Within major version 18, minor versions before PostgreSQL 18.4     are affected.  Versions before PostgreSQL 18 are unaffected. (CVE-2026-6575)

    Stack buffer overflow in PostgreSQL module refint allows an unprivileged database user to execute     arbitrary code as the operating system user running the database.  A distinct attack is possible if the     application declares a user-controlled column as a refint cascade primary key and facilitates user-     controlled updates to that column.  In that case, a SQL injection allows a primary key update value     provider to execute arbitrary SQL as the database user performing the primary key update.  Versions before     PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6637)

    SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a     subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials.
    The attack takes effect at the next REFRESH PUBLICATION.  Within major versions 16, 17, and 18, minor     versions before PostgreSQL 18.4, 17.10, and 16.14 are affected.  Versions before PostgreSQL 16 are     unaffected. (CVE-2026-6638)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of PostgreSQL installed on the remote host is 14 prior to 14.23, 15 prior to 15.18, 16 prior to 16.14, 17 prior to 17.10, or 18 prior to 18.4. As such, it is potentially affected by multiple vulnerabilities:

  - Stack buffer overflow in PostgreSQL module refint allows an unprivileged database user to execute     arbitrary code as the operating system user running the database. A distinct attack is possible if the     application declares a user-controlled column as a refint cascade primary key and facilitates user-     controlled updates to that column. In that case, a SQL injection allows a primary key update value     provider to execute arbitrary SQL as the database user performing the primary key update. Versions before     PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6637)

  - Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(),     lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack     buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-     length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in     psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions     before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6477)

  - Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause     the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the     operating system user running the database. In applications that pass gigabyte-scale user inputs to the     relevant database functions, the application input provider may achieve a segmentation fault. Versions     before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6473)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8294-1 advisory.

    It was discovered that PostgreSQL did not correctly enforce authorization for CREATE TYPE. An attacker     could possibly use this issue to execute arbitrary SQL functions. (CVE-2026-6472)

    It was discovered that PostgreSQL incorrectly handled large user input in multiple server features. An     attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or     execute arbitrary code. (CVE-2026-6473)

    It was discovered that PostgreSQL incorrectly handled format strings in the timeofday() function. An     attacker could possibly use this issue to obtain sensitive information. (CVE-2026-6474)

    It was discovered that PostgreSQL incorrectly followed symbolic links in pg_basebackup and pg_rewind. An     attacker could possibly use this issue to overwrite local files and execute arbitrary code.
    (CVE-2026-6475)

    It was discovered that PostgreSQL had an SQL injection vulnerability in pg_createsubscriber. An attacker     could possibly use this issue to execute arbitrary SQL as a superuser. This issue only affected Ubuntu     25.10 and Ubuntu 26.04 LTS. (CVE-2026-6476)

    It was discovered that PostgreSQL used an unsafe libpq function in large object operations. An attacker     could possibly use this issue to overwrite client memory and execute arbitrary code. (CVE-2026-6477)

    It was discovered that PostgreSQL did not compare MD5-hashed passwords in constant time. An attacker could     possibly use this issue to obtain sensitive information. (CVE-2026-6478)

    It was discovered that PostgreSQL had uncontrolled recursion during SSL and GSS negotiation. An attacker     could possibly use this issue to cause a denial of service. (CVE-2026-6479)

    It was discovered that PostgreSQL incorrectly handled array length mismatches in     pg_restore_attribute_stats(). An attacker could possibly use this issue to obtain sensitive information.
    This issue only affected Ubuntu 26.04 LTS. (CVE-2026-6575)

    It was discovered that PostgreSQL had a stack buffer overflow in the refint module. An attacker could use     this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly execute arbitrary     code. (CVE-2026-6637)

    It was discovered that PostgreSQL had an SQL injection vulnerability in logical replication REFRESH     PUBLICATION. An attacker could possibly use this issue to execute arbitrary SQL. This issue only affected     Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-6638)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1946-1 advisory.

    This update for postgresql18 fixes the following issues

    Update to version 18.4.

    Security issues:

    - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
    - CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
    - CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
    - CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
    - CVE-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
    - CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
    - CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
    - CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
    - CVE-2026-6575: Detect faulty input when restoring attribute MCV statistics (bsc#1265180).
    - CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).
    - CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

    Non security issue:

    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer to support immutable systems and     transactional       updates (jsc#PED-14820).
    - /usr/bin/pg_config is missing after migrating away from update-alternatives (bsc#1263804).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1945-1 advisory.

    This update for postgresql18 fixes the following issues

    Update to version 18.4.

    Security issues:

    - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
    - CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
    - CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
    - CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
    - CVE-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
    - CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
    - CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
    - CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
    - CVE-2026-6575: Detect faulty input when restoring attribute MCV statistics (bsc#1265180).
    - CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).
    - CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

    Non security issue:

    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer to support immutable systems and     transactional       updates (jsc#PED-14820).
    - /usr/bin/pg_config is missing after migrating away from update-alternatives (bsc#1263804).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1944-1 advisory.

    This update for postgresql18 fixes the following issues

    Update to version 18.4.

    Security issues:

    - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
    - CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
    - CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
    - CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
    - CVE-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
    - CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
    - CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
    - CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
    - CVE-2026-6575: Detect faulty input when restoring attribute MCV statistics (bsc#1265180).
    - CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).
    - CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

    Non security issue:

    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer to support immutable systems and     transactional       updates (jsc#PED-14820).
    - /usr/bin/pg_config is missing after migrating away from update-alternatives (bsc#1263804).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 7185ecc9-4fb7-11f1-bc50-6cc21735f730 advisory.

    The PostgreSQL project reports:

              Missing authorization in PostgreSQL CREATE TYPE               allows an object creator to hijack other queries that use               search_path to find user-defined types, including               extension-defined types. That is to say, the victim will execute               arbitrary SQL functions of the attacker's choice.


              Integer wraparound in multiple PostgreSQL server               features allows an application input provider to cause the               server to undersize an allocation and write out-of-bounds. This               results in a segmentation fault.


              Externally-controlled format string in PostgreSQL timeofday()               function allows an attacker to retrieve portions of server               memory, via crafted timezone zones.


              Symlink following in               PostgreSQL pg_basebackup plain format and in pg_rewind allows an               origin superuser to overwrite local files, e.g.
              /var/lib/postgres/.bashrc, that hijack the operating system               account. It will remain the case that starting the server after               these commands implicitly trusts the origin superuser, due to               features like shared_preload_libraries. Hence, the attack has               practical implications only if one takes relevant action between               these commands and server start, like moving the files to a               different VM or snapshotting the VM.


              SQL injection in PostgreSQL               pg_createsubscriber allows an attacker with               pg_create_subscription rights to execute arbitrary SQL as a               superuser. The attack takes effect when pg_createsubscriber next               runs. Versions before PostgreSQL 17 are unaffected.


              PostgreSQL libpq lo_* functions let server superuser overwrite               client stack memory. Use of inherently dangerous function               PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(),               lo_read(), lo_lseek64(), and lo_tell64() functions allows the               server superuser to overwrite a client stack buffer with an               arbitrarily-large response. Like gets(), PQfn(...,               result_is_int=0, ...) stores arbitrary-length, server-determined               data into a buffer of unspecified size. Because both the               \lo_export command in psql and pg_dump call lo_read(), the               server superuser can overwrite pg_dump or psql stack memory.


              PostgreSQL discloses MD5-hashed passwords via covert timing               channel. Covert timing channel in comparison of MD5-hashed               password in PostgreSQL authentication allows an attacker to               recover user credentials sufficient to authenticate. This does               not affect scram-sha-256 passwords, the default in all supported               releases. However, current databases may have MD5-hashed               passwords originating in upgrades from PostgreSQL 13 or earlier.


              PostgreSQL SSL/GSS init causes denial of service, via               uncontrolled recursion. Uncontrolled recursion in PostgreSQL SSL               and GSS negotiation allows an attacker able to connect to a               PostgreSQL AF_UNIX socket to achieve sustained denial of               service. If SSL and GSS are both disabled, an attacker can do               the same via access to a PostgreSQL TCP socket.


              PostgreSQL pg_restore_attribute_stats accepts values that cause               query planning to read past end of stats array. Buffer over-read               in PostgreSQL function pg_restore_attribute_stats() accepts               array values of unmatched length, which causes query planning to               read past end of one array. This allows a table maintainer to               infer memory values past that array end. Versions before               PostgreSQL 18 are unaffected.


              PostgreSQL refint allows stack buffer overflow and SQL               injection. Stack buffer overflow in PostgreSQL module refint               allows an unprivileged database user to execute arbitrary code               as the operating system user running the database. A distinct               attack is possible if the application declares a user-controlled               column as a refint cascade primary key and facilitates               user-controlled updates to that column. In that case, a SQL               injection allows a primary key update value provider to execute               arbitrary SQL as the database user performing the primary key               update.


              PostgreSQL REFRESH PUBLICATION allows SQL injection via table               name. SQL injection in PostgreSQL logical replication ALTER               SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table               creator to execute arbitrary SQL with the subscription's               publication-side credentials. The attack takes effect at the               next REFRESH PUBLICATION. Versions before PostgreSQL 16 are               unaffected.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Buffer over-read in PostgreSQL function pg_restore_attribute_stats() accepts array values of unmatched     length, which causes query planning to read past end of one array. This allows a table maintainer to infer     memory values past that array end. Within major version 18, minor versions before PostgreSQL 18.4 are     affected. Versions before PostgreSQL 18 are unaffected. (CVE-2026-6575)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
320430	openSUSE 16 Security Update : postgresql18 (openSUSE-SU-2026:20901-1)	Nessus	SuSE Local Security Checks	high
319870	Amazon Linux 2023 : postgresql18, postgresql18-contrib, postgresql18-llvmjit (ALAS2023-2026-1780)	Nessus	Amazon Linux Local Security Checks	high
316515	PostgreSQL 14.x < 14.23 / 15.x < 15.18 / 16.x < 16.14 / 17.x < 17.10 / 18.x < 18.4 Multiple Vulnerabilities	Nessus	Databases	high
316495	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : PostgreSQL vulnerabilities (USN-8294-1)	Nessus	Ubuntu Local Security Checks	high
315292	SUSE SLES12 Security Update : postgresql18 (SUSE-SU-2026:1946-1)	Nessus	SuSE Local Security Checks	high
315271	SUSE SLES15 Security Update : postgresql18 (SUSE-SU-2026:1945-1)	Nessus	SuSE Local Security Checks	high
315255	SUSE SLED15 / SLES15 Security Update : postgresql18 (SUSE-SU-2026:1944-1)	Nessus	SuSE Local Security Checks	high
314914	FreeBSD : PostgreSQL -- Multiple vulnerabilities (7185ecc9-4fb7-11f1-bc50-6cc21735f730)	Nessus	FreeBSD Local Security Checks	high
314714	Linux Distros Unpatched Vulnerability : CVE-2026-6575	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-6575

medium

Tenable Plugins

high

high

high

high

high

high

high

high

medium