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…
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
Description
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 3.1
- 6.5 MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- toddr/yaml\
- Source
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
References
- https://github.com/cpan-authors/YAML-Syck/pull/65Issue Tracking
- https://metacpan.org/dist/YAML-Syck/changesProduct, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.