Vulnerability in Felipe Toml::xs
CVE-2026-16634
TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99. The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker. Any caller that passes untrusted TOML to from_toml risks a stack overflow from a deeply-nested document. TOML::XS version 0.06 or later uses the successor tomlc17 library.
EPSS: 0.005 (41.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Felipe Toml::xs — versions 0
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (technical-description)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-16634?
- CVE-2026-16634 is a critical-severity vulnerability in Felipe Toml::xs, classified under CWE-1104. CVSS score: 9.8/10. Published 2026-07-24.
- How severe is CVE-2026-16634?
- Critical severity. CVSS v3 base score is 9.8 out of 10.