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ALSA-2026:67269 — Important: perl-YAML-Syck security update

Affected: AlmaLinux:8: perl-YAML-Syck

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):

* YAML-Syck: YAML::Syck: Denial of Service via crafted YAML document (CVE-2026-13713)

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.

BELL-CVE-2026-13713

Affected: Alpaquita:23: perl-yaml-syck, Alpaquita:25: perl-yaml-syck, Alpaquita:stream: perl-yaml-syck

EUVD-2026-338432

fkie_cve-2026-13713

YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack.

In the bundled libsyck, when an anchor name is redefined or removed, syck_hdlr_add_anchor and syck_hdlr_remove_anchor free the node stored under that name with syck_free_node. That node can still be live on the parser's value stack, so syck_hdlr_add_node reaches it again and frees it a second time. On a normal build the 48-byte node chunk is freed twice and the interpreter aborts. Anchors need no special flags, so this is reached on the default Load path, and a 7-byte document that redefines an anchor triggers it.

Any caller that runs Load or LoadFile on an untrusted document that redefines an anchor mid-parse crashes the interpreter, a denial of service.

GHSA-p3p9-6pr6-mr9m

YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack.

Any caller that runs Load or LoadFile on an untrusted document that redefines an anchor mid-parse crashes the interpreter, a denial of service.

openSUSE-SU-2026:11299-1 — perl-YAML-Syck-1.470.0-1.1 on GA media

perl-YAML-Syck-1.470.0-1.1 on GA media

RLSA-2026:67269 — Important: perl-YAML-Syck security update

Affected: Rocky Linux:8: perl-YAML-Syck

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):

* YAML-Syck: YAML::Syck: Denial of Service via crafted YAML document (CVE-2026-13713)

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.

UBUNTU-CVE-2026-13713

Affected: Ubuntu:Pro:16.04:LTS: libyaml-syck-perl, Ubuntu:Pro:18.04:LTS: libyaml-syck-perl, Ubuntu:Pro:20.04:LTS: libyaml-syck-perl, Ubuntu:Pro:22.04:LTS: libyaml-syck-perl, Ubuntu:Pro:24.04:LTS: libyaml-syck-perl, Ubuntu:26.04:LTS: libyaml-syck-perl

YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack. In the bundled libsyck, when an anchor name is redefined or removed, syck_hdlr_add_anchor and syck_hdlr_remove_anchor free the node stored under that name with syck_free_node. That node can still be live on the parser's value stack, so syck_hdlr_add_node reaches it again and frees it a second time. On a normal build the 48-byte node chunk is freed twice and the interpreter aborts. Anchors need no special flags, so this is reached on the default Load path, and a 7-byte document that redefines an anchor triggers it. Any caller that runs Load or LoadFile on an untrusted document that redefines an anchor mid-parse crashes the interpreter, a denial of service.

WID-SEC-W-2026-2508 — cPanel cPanel/WHM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in cPanel cPanel/WHM ausnutzen, um möglicherweise beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder einen Denial-of-Service-Zustand herbeizuführen.