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OpenAdvisories
High ALSA-2026:6470 1 CVE

Important: perl-YAML-Syck security update

Published Apr 2, 2026 · Updated Oct 29, 2026

Summary

This module provides a Perl interface to the libsyck data serialization library. It exports the Dump and Load functions for converting Perl data structures to YAML strings, and the other way around.

Security Fix(es):

* perl-YAML-Syck: YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter (CVE-2026-4177)

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.

Fixed packages 1

ReleasePackageFixed in
AlmaLinux · 8 perl-YAML-Syck 1.30-6.el8_10

Vulnerabilities 1

  • Critical 9.1

    YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter

    YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter. The heap overflow occurs when class names exceed the initial 512-byte allocation. The base64 decoder c…

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-4177
  • report
    https://bugzilla.redhat.com/2448277
  • advisory
    https://errata.almalinux.org/8/ALSA-2026-6470.html