Buffer overflow in Toddr Yaml\
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Toddr Yaml\ — versions \
- Toddr Yaml::syck — versions 0
- Toddr Yaml\:\:syck
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (patch, Issue Tracking)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes, Product, Release Notes)
Frequently asked questions
- What is CVE-2025-11683?
- CVE-2025-11683 is a medium-severity vulnerability in Toddr Yaml\, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2025-10-16.
- How severe is CVE-2025-11683?
- Medium severity. CVSS v3 base score is 6.5 out of 10.