What is CVE-2026-5089?

CVE-2026-5089 is a high-severity vulnerability in Toddr Yaml::syck, classified under Buffer Underwrite. CVSS score: 7.3/10. Published 2026-05-12.

How severe is CVE-2026-5089?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Toddr Yaml::syck

CVE-2026-5089

YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a c…

EPSS: 0.000 (14.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Toddr Yaml::syck — versions 0

Weakness classification (CWE)

CWE-124 — Buffer Underwrite

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-5089?: CVE-2026-5089 is a high-severity vulnerability in Toddr Yaml::syck, classified under Buffer Underwrite. CVSS score: 7.3/10. Published 2026-05-12.
How severe is CVE-2026-5089?: High severity. CVSS v3 base score is 7.3 out of 10.