Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.8%
CVSS Severity
CVSS v3 Score 6.5
References