CVE-2026-4177

perl-YAML-Syck: This module provides a Perl interface to the libsyck data serialization library

CVE-2026-4177 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2026-4177, released March 16, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
9.1
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0046
39th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
libyaml-syck-perl · Debian 12.15 (bookworm) 1.34-2+deb12u2 DSA-6175-1 Mar 22, 2026
libyaml-syck-perl · Debian 13.5 (trixie) 1.34-2+deb13u2 DSA-6175-1 Mar 22, 2026
libyaml-syck-perl · Debian 14 1.36-2 DEBIAN-CVE-2026-4177 Mar 16, 2026
perl-YAML-Syck · RHEL 8 0:1.30-6.el8_10 RHSA-2026:6470 Apr 15, 2026
perl-YAML-Syck · almalinux 8 1.30-6.el8_10 ALSA-2026:6470 Apr 2, 2026
perl-YAML-Syck · amzn 2023 1.37-1.amzn2023.0.1 ALAS2023-2026-1517 Mar 30, 2026
perl-YAML-Syck · ol 8 0:1.30-6.el8_10 ELSA-2026-6470 Apr 3, 2026
perl-YAML-Syck · rocky 8 0:1.30-6.el8_10 RLSA-2026:6470 Apr 9, 2026
perl-YAML-Syck-debuginfo · amzn 2023 1.37-1.amzn2023.0.1 ALAS2023-2026-1517 Mar 30, 2026
perl-YAML-Syck-debugsource · amzn 2023 1.37-1.amzn2023.0.1 ALAS2023-2026-1517 Mar 30, 2026
perl-YAML-Syck-tests · amzn 2023 1.37-1.amzn2023.0.1 ALAS2023-2026-1517 Mar 30, 2026

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