YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer: while ( colon >= ptr && *colon != ':' ) { colon--; } if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20938-1 advisory.

    Changes in perl-YAML-Syck:

    - CVE-2026-5089: prevent buffer underflow in base60 (sexagesimal) parsing (PR #133) (bsc#1265155).

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

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

The version of perl-YAML-Syck installed on the remote host is prior to 1.27-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3327 advisory.

    YAML::Syck versions before 1.38 for Perl  has an out-of-bounds read.

    The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and     float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in     1:30:45), the inner while loop can decrement a pointer past the start of the string buffer:

    while ( colon >= ptr && *colon != ':' ){colon--;}if ( *colon == ':' ) *colon = '\0';  // colon may be     ptr-1 here

    When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon     dereference reads one byte before the allocated buffer. (CVE-2026-5089)

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

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

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1769 advisory.

    YAML::Syck versions before 1.38 for Perl  has an out-of-bounds read.

    The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and     float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in     1:30:45), the inner while loop can decrement a pointer past the start of the string buffer:

    while ( colon >= ptr && *colon != ':' ){colon--;}if ( *colon == ':' ) *colon = '\0';  // colon may be     ptr-1 here

    When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon     dereference reads one byte before the allocated buffer. (CVE-2026-5089)

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

Note that Nessus has not tested for this issue 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.

  - YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code     in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing     the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can     decrement a pointer past the start of the string buffer: while ( colon >= ptr && *colon != ':' ) {     colon--; } if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here When no colon is found     (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before     the allocated buffer. (CVE-2026-5089)

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

ID	Name	Product	Family	Severity
321002	openSUSE 16 Security Update : perl-YAML-Syck (openSUSE-SU-2026:20938-1)	Nessus	SuSE Local Security Checks	high
319855	Amazon Linux 2 : perl-YAML-Syck, --advisory ALAS2-2026-3327 (ALAS-2026-3327)	Nessus	Amazon Linux Local Security Checks	high
319805	Amazon Linux 2023 : perl-YAML-Syck, perl-YAML-Syck-tests (ALAS2023-2026-1769)	Nessus	Amazon Linux Local Security Checks	high
315674	Linux Distros Unpatched Vulnerability : CVE-2026-5089	Nessus	Misc.	high

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CVE-2026-5089

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Tenable Plugins

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