A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus server can supply a cookie_context containing path traversal sequences, causing the client to read an arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2026:0256 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2025-14087:
    A flaw was found in GLib (Gnome Lib). This vulnerability allows a remote attacker to cause heap     corruption, leading to a denial of service or potential code execution via a buffer-underflow in the     GVariant parser when processing maliciously crafted input strings.

    CVE-2026-58010:
    A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the     glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses >     instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information     disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.

    CVE-2026-58011:
    A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the g_date_time_get_ymd     function in the glib/gdatetime.c file when an invalid GDateTime object produced by the     g_date_time_add_full function is processed. This flaw can corrupt the date output and potentially cause     logic errors that may lead to a denial of service.

    CVE-2026-58012:
    A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the     `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append function     processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is     treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a     denial of service when the buffer over-read crosses a page boundary.

    CVE-2026-58013:
    A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the     giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to     read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a     denial of service when the buffer over-read crosses a page boundary.

    CVE-2026-58014:
    A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function     in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds     access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.

    CVE-2026-58015:
    A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication     mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus     server can supply a cookie_context containing path traversal sequences, causing the client to read an     arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.

    CVE-2026-58016:
    A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the     gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a     `node` element nested within other elements like `method`, `signal`, `property` or `arg`. This issue can     cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1482:02 advisory.

    * glib: GLib: Buffer underflow in GVariant parser leads to heap corruption (CVE-2025-14087)
      * glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal() (CVE-2026-58010)
      * glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid GDateTime     (CVE-2026-58011)
      * glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()     (CVE-2026-58012)
      * glib: buffer over-read in glib/giochannel.c via g_io_channel_read_line_backend (CVE-2026-58013)
      * glib: off-by-one error in glib/gkeyfile.c via g_key_file_get_locale_string_list (CVE-2026-58014)
      * glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and     mechanism_client_data_receive (CVE-2026-58015)
      * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml     (CVE-2026-58016)

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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-49512 advisory.

    - Fix CVE-2026-58010: off-by-one error in gvs_tuple_is_normal()       Resolves: RHEL-212164
    - Fix CVE-2026-58011: g_date_time_add_full() range validation       Resolves: RHEL-212184
    - Fix CVE-2026-58013: memcmp buffer over-read in giochannel       Resolves: RHEL-212234
    - Fix CVE-2026-58012: buffer overflow in gregex substitutions       Resolves: RHEL-212200
    - Fix CVE-2025-14087: integer overflow in GVariant parser       Resolves: RHEL-154707
    - Fix CVE-2026-58016: D-Bus introspection XML node nesting check       Resolves: RHEL-190617
    - Fix CVE-2026-58014: one-byte heap under-read in mingw-glib2       Resolves: RHEL-190609

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 RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:49512 advisory.

    * glib: GLib: Buffer underflow in GVariant parser leads to heap corruption (CVE-2025-14087)

    * glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal() (CVE-2026-58010)

    * glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid GDateTime (CVE-2026-58011)

    * glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()     (CVE-2026-58012)

    * glib: buffer over-read in glib/giochannel.c via g_io_channel_read_line_backend (CVE-2026-58013)

    * glib: off-by-one error in glib/gkeyfile.c via g_key_file_get_locale_string_list (CVE-2026-58014)

    * glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and     mechanism_client_data_receive (CVE-2026-58015)

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:49512 advisory.

    GLib provides the core application building blocks for libraries and applications written in C. It     provides the core object system used in GNOME, the main loop implementation, and a large set of utility     functions for strings and common data structures.

    Security Fix(es):

    * glib: GLib: Buffer underflow in GVariant parser leads to heap corruption (CVE-2025-14087)

    * glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal() (CVE-2026-58010)

    * glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid GDateTime (CVE-2026-58011)

    * glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()     (CVE-2026-58012)

    * glib: buffer over-read in glib/giochannel.c via g_io_channel_read_line_backend (CVE-2026-58013)

    * glib: off-by-one error in glib/gkeyfile.c via g_key_file_get_locale_string_list (CVE-2026-58014)

    * glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and     mechanism_client_data_receive (CVE-2026-58015)

    * glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

    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 ALAS2023-2026-1942 advisory.

    A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the     glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses >     instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information     disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.
    (CVE-2026-58010)

    A flaw was found in GLib. An out-of-bounds read of only 2 bytes can occur in the g_date_time_get_ymd     function in the glib/gdatetime.c file when an invalid GDateTime object produced by the     g_date_time_add_full function is processed. This flaw can corrupt the date output and potentially cause     logic errors that may lead to a denial of service. (CVE-2026-58011)

    A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the     `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append function     processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is     treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a     denial of service when the buffer over-read crosses a page boundary. (CVE-2026-58012)

    A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the     giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to     read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a     denial of service when the buffer over-read crosses a page boundary. (CVE-2026-58013)

    A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function     in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds     access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.
    (CVE-2026-58014)

    A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication     mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus     server can supply a cookie_context containing path traversal sequences, causing the client to read an     arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.
    (CVE-2026-58015)

    A flaw was found in GLib. A state confusion issue exists in g_dbus_node_info_new_for_xml() in the     gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a     <node> element nested within other elements like <method>, <signal>, <property> or <arg>. This issue can     cause an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.
    (CVE-2026-58016)

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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7bf2937528 advisory.

    Backport fix for CVE-2026-58016.

    ----

    Update to glib-2.88.2.

Tenable has extracted the preceding description block directly from the Fedora 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.

  - A flaw was found in GLib. The D-Bus client-side implementation of the DBUS_COOKIE_SHA1 SASL authentication     mechanism does not validate the cookie_context parameter received from the server. A malicious D-Bus     server can supply a cookie_context containing path traversal sequences, causing the client to read an     arbitrary file and exfiltrate sensitive data by verifying guessed file contents against a generated hash.
    (CVE-2026-58015)

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

ID	Name	Product	Family	Type	Severity
335040	Alibaba Cloud Linux 3 : 0256: mingw-glib2 (ALINUX3-SA-2026:0256)	Nessus	Alibaba Cloud Linux Local Security Checks	Local	critical
333272	MiracleLinux 8 : mingw-glib2-2.70.1-9.el8_10 (AXSA:2026-1482:02)	Nessus	Miracle Linux Local Security Checks	Local	critical
332099	Oracle Linux 8 : mingw-glib2 (ELSA-2026-49512)	Nessus	Oracle Linux Local Security Checks	Local	critical
331923	RockyLinux 8 : mingw-glib2 (RLSA-2026:49512)	Nessus	Rocky Linux Local Security Checks	Local	critical
331733	RHEL 8 : mingw-glib2 (RHSA-2026:49512)	Nessus	Red Hat Local Security Checks	Local	critical
328478	Amazon Linux 2023 : glib2, glib2-devel, glib2-static (ALAS2023-2026-1942)	Nessus	Amazon Linux Local Security Checks	Local	critical
327486	Fedora 44 : mingw-glib2 (2026-7bf2937528)	Nessus	Fedora Local Security Checks	Local	critical
324018	Linux Distros Unpatched Vulnerability : CVE-2026-58015	Nessus	Misc.	Local	high

Detections

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CVE-2026-58015

high

Tenable Plugins

critical

critical

critical

critical

critical

critical

critical

high