CVE-2026-16634CWE-1104CWE-1395

TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99

Critical · published July 24, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
41.7
In the wild
Unconfirmed
What it is

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The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00512 · 41.7th percentile
Weaknesses
CWE-1104 · Use of Unmaintained Third Party Components; CWE-1395 · Dependency on Vulnerable Third-Party Component
Published
2026-07-24T09:14Z
EPSS history
Timeline
  • 24 JUL 09:14Z
    TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99
    cvelistv5