Disclosure summary
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.
Source-reported weakness categories
CWE-119
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-11683
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| toddr | yaml::syck | * {"versionEndExcluding":"1.36"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Issue Tracking
- metacpan.org — Product, Release Notes
PUBLISHED 2025-10-15T21:15:32-04:00
MODIFIED 2026-10-08T07:10:00-04:00
INGESTED 2026-10-08T12:30:43-04:00