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Critical RHSA-2026:6470 1 CVE

Red Hat Security Advisory: perl-YAML-Syck security update

Published Apr 3, 2026 · Updated Jun 28, 2026

Ecosystem: Red Hat

Fixed packages 3

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::crb perl-YAML-Syck 0:1.30-6.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb perl-YAML-Syck-debuginfo 0:1.30-6.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb perl-YAML-Syck-debugsource 0:1.30-6.el8_10

Vulnerabilities 1

  • Critical 9.1
    CVE-2026-4177

    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…

    TODDR YAML::Syck libyaml-syck-perl perl-YAML-Syck Debian Ubuntu Azure Linux Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2448277
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6470.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-4177
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-4177
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-4177
  • article
    https://github.com/cpan-authors/YAML-Syck/commit/e8844a31c8cf0052914b198fc784ed4e6b8ae69e.patch
  • article
    https://metacpan.org/release/TODDR/YAML-Syck-1.37_01/changes#L21