APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android. Users are recommended to upgrade to version 1.6.4, which fixes this issue.

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1836:01 advisory.

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)
      * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)
      * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)
      * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client     (CVE-2026-34502)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:66392 advisory.

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)
      * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)
      * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)
      * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client     (CVE-2026-34502)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:66392 advisory.

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)

    * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)

    * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client (CVE-2026-34502)

Tenable has extracted the preceding description block directly from the RockyLinux 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 RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:66341 advisory.

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)

    * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)

    * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client (CVE-2026-34502)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-663920 advisory.

    - Resolves: RHEL-236629 - apr-util: Apache Portable Runtime Utility: Information       disclosure via timing attack in password validation (CVE-2025-49506)
    - Resolves: RHEL-236264 - apr-util: Apache Portable Runtime Utility: Heap buffer       overflow in APR memcached client (CVE-2026-34502)
    - Resolves: RHEL-236469 - apr-util: Apache Portable Runtime Utility: Heap buffer       overflow in redis client (CVE-2026-34501)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-663410 advisory.

    - Resolves: RHEL-236631 - apr-util: Apache Portable Runtime Utility: Information       disclosure via timing attack in password validation (CVE-2025-49506)
    - Resolves: RHEL-236266 - apr-util: Apache Portable Runtime Utility: Heap buffer       overflow in APR memcached client (CVE-2026-34502)
    - Resolves: RHEL-236478 - apr-util: Apache Portable Runtime Utility: Heap buffer       overflow in redis client (CVE-2026-34501)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:66392 advisory.

    The mission of the Apache Portable Runtime (APR) is to provide a free library of C data structures and     routines.  This library contains additional utility interfaces for APR; including support for XML, LDAP,     database interfaces, URI parsing and more.

    Security Fix(es):

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)

    * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)

    * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client (CVE-2026-34502)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:66341 advisory.

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)
      * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)
      * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)
      * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client     (CVE-2026-34502)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:66341 advisory.

    The mission of the Apache Portable Runtime (APR) is to provide a free library of C data structures and     routines.  This library contains additional utility interfaces for APR; including support for XML, LDAP,     database interfaces, URI parsing and more.

    Security Fix(es):

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in redis client (CVE-2026-34501)

    * apr-util: Apache Portable Runtime Utility: Information disclosure via timing attack in password     validation (CVE-2025-49506)

    * apr-util: Apache Portable Runtime Utility: Denial of Service via XML stack recursion attack     (CVE-2026-32327)

    * apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client (CVE-2026-34502)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 ALAS2023-2026-2115 advisory.

    APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards     to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack     particularly on platforms without crypt() such as  Windows, BeOS, NetWare, or Android.

    Users are recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2025-49506)

    A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer     which parses XML from untrusted sources and uses the apr_xml_quote_elem() function.

    Users are recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2026-32327)

    Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client.

    This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3.

    Users are recommended to upgrade to version 1.6.4, which fixes the issue. (CVE-2026-34501)

    Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility memcached client

    This issue affects Apache Portable Runtime Utility: from 1.3.0 through 1.6.3. (CVE-2026-34502)

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 apr-util installed on the remote host is prior to 1.6.5-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3892 advisory.

    APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards     to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack     particularly on platforms without crypt() such as  Windows, BeOS, NetWare, or Android.

    Users are recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2025-49506)

    A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer     which parses XML from untrusted sources and uses the apr_xml_quote_elem() function.

    Users are recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2026-32327)

    Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client.

    This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3.

    Users are recommended to upgrade to version 1.6.4, which fixes the issue. (CVE-2026-34501)

    Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility memcached client

    This issue affects Apache Portable Runtime Utility: from 1.3.0 through 1.6.3. (CVE-2026-34502)

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 remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21672-1 advisory.

    - CVE-2025-49506: hash/password content leak via side channel timing attack against     `apr_password_validate()`       (bsc#1274237).
    - CVE-2026-32327: XML stack recursion crash (bsc#1274235).
    - CVE-2026-34191: SQL injection via `apr_dbd_oracle` (bsc#1274850).
    - CVE-2026-34501: heap buffer overflow in redis client (bsc#1274852).
    - CVE-2026-34502: heap buffer overflow in APR memcached client (bsc#1274854).

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 Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4742 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4742-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     August 16, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : apr-util     Version        : 1.6.1-5+deb11u2 1.6.3-1+deb12u1     CVE ID         : CVE-2025-49506 CVE-2026-32327 CVE-2026-34191 CVE-2026-34501                      CVE-2026-34502     Debian Bug     : 1143837


    Several vulnerabilities were discovered in apr-util, the Apache Portable     Runtime Utility library, which could result in denial of service or     potentially the execution of arbitrary code.

    For Debian 11 bullseye, these problems have been fixed in version     1.6.1-5+deb11u2.

    For Debian 12 bookworm, these problems have been fixed in version     1.6.3-1+deb12u1.

    We recommend that you upgrade your apr-util packages.

    For the detailed security status of apr-util please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/apr-util

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6437 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6437-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     August 13, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : apr-util     CVE ID         : CVE-2025-49506 CVE-2026-32327 CVE-2026-34501 CVE-2026-34502     Debian Bug     : 1143837

    Several vulnerabilities were discovered in apr-util, the Apache Portable     Runtime Utility library, which could result in denial of service or     potentially the execution of arbitrary code.

    For the stable distribution (trixie), these problems have been fixed in     version 1.6.3-3+deb13u1.

    We recommend that you upgrade your apr-util packages.

    For the detailed security status of apr-util please refer to its     security tracker page at:
    https://security-tracker.debian.org/tracker/apr-util

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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

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

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards
    to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack
    particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android. Users are
    recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2025-49506)

  - A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer
    which parses XML from untrusted sources and uses the apr_xml_quote_elem() function. Users are recommended
    to upgrade to version 1.6.4, which fixes this issue. (CVE-2026-32327)

  - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in
    Apache Portable Runtime Utility via apr_dbd_oracle provider. This issue affects Apache Portable Runtime
    Utility: from 1.6.0 through 1.6.3 (CVE-2026-34191)

  - Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client. This issue
    affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3. Users are recommended to upgrade to
    version 1.6.4, which fixes the issue. (CVE-2026-34501)

  - Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility memcached client This issue
    affects Apache Portable Runtime Utility: from 1.3.0 through 1.6.3. (CVE-2026-34502)

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

  - APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards     to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack     particularly on platforms without crypt() such as Windows, BeOS, NetWare, or Android. Users are     recommended to upgrade to version 1.6.4, which fixes this issue. (CVE-2025-49506)

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

ID	Name	Product	Family	Type	Severity
345890	MiracleLinux 9 : apr-util-1.6.1-23.el9_8.1 (AXSA:2026-1836:01)	Nessus	Miracle Linux Local Security Checks	Local	critical
344841	AlmaLinux 10 : apr-util (ALSA-2026:66392)	Nessus	Alma Linux Local Security Checks	Local	critical
344837	RockyLinux 10 : apr-util (RLSA-2026:66392)	Nessus	Rocky Linux Local Security Checks	Local	critical
344824	RockyLinux 9 : apr-util (RLSA-2026:66341)	Nessus	Rocky Linux Local Security Checks	Local	critical
344654	Oracle Linux 10 : ELSA-2026-66392-0: / apr-util (ELSA-2026-663920)	Nessus	Oracle Linux Local Security Checks	Local	critical
344604	Oracle Linux 9 : ELSA-2026-66341-0: / apr-util (ELSA-2026-663410)	Nessus	Oracle Linux Local Security Checks	Local	critical
344580	RHEL 10 : apr-util (RHSA-2026:66392)	Nessus	Red Hat Local Security Checks	Local	critical
344578	AlmaLinux 9 : apr-util (ALSA-2026:66341)	Nessus	Alma Linux Local Security Checks	Local	critical
344541	RHEL 9 : apr-util (RHSA-2026:66341)	Nessus	Red Hat Local Security Checks	Local	critical
342039	Amazon Linux 2023 : apr-util, apr-util-devel, apr-util-ldap (ALAS2023-2026-2115)	Nessus	Amazon Linux Local Security Checks	Local	critical
341903	Amazon Linux 2 : apr-util, --advisory ALAS2-2026-3892 (ALAS-2026-3892)	Nessus	Amazon Linux Local Security Checks	Local	critical
341578	openSUSE 16: apr-util-devel / libapr-util1-0 / libapr-util1-0-dbd-mysql / etc (openSUSE-SU-2026:21672-1)	Nessus	SuSE Local Security Checks	Local	critical
335907	Debian dla-4742 : libaprutil1 - security update	Nessus	Debian Local Security Checks	Local	critical
335213	Debian dsa-6437 : libaprutil1-dbd-mysql - security update	Nessus	Debian Local Security Checks	Local	critical
445793	Alpine: multiple apr-util packages: security update to 1.6.4-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	critical
445793	Alpine: multiple apr-util packages: security update to 1.6.4-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	critical
333187	Linux Distros Unpatched Vulnerability : CVE-2025-49506	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2025-49506

high

Tenable Plugins

critical

critical

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high