CVE-2025-11683

YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values. There is no indication that the issue leads to accessing memory outside that allocated to the module.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/cpan-authors/YAML-Syck/pull/65	Issue Tracking
https://metacpan.org/dist/YAML-Syck/changes	Product Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:toddr:yaml\:\:syck:*:*:*:*:*:perl:*:*

History

08 Oct 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de YAML::Syck anteriores a la 1.36 para Perl tienen terminadores nulos faltantes, lo que causa una lectura fuera de límites y una potencial revelación de información. Los terminadores nulos faltantes en token.c conducen a una lectura fuera de límites, lo que permite que se lea una variable adyacente. El problema se observa con archivos YAML complejos que tienen un hash de todas las claves y valores vacíos. No hay indicios de que el problema conduzca a acceder a memoria fuera de la asignada al módulo.

Information

Published : 2025-10-16 01:15

Updated : 2026-10-08 11:10

NVD link : CVE-2025-11683

Mitre link : CVE-2025-11683

CVE.ORG link : CVE-2025-11683

JSON object : View

Products Affected

toddr

yaml\

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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