Description
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The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.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.
Published: 2026-07-24
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to TOML::XS version 0.06 or later.


Vendor Workaround

Only parse trusted TOML files.

Tracking

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Advisories

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History

Mon, 27 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 27 Jul 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Felipe
Felipe toml::xs
Vendors & Products Felipe
Felipe toml::xs

Fri, 24 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Description 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 The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.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.
Title TOML::XS versions before 0.06 for Perl bundle an unsupported and vulnerable version of tomlc99
Weaknesses CWE-1104
CWE-1395
References

cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-07-27T17:15:54.188Z

Reserved: 2026-07-22T16:37:55.533Z

Link: CVE-2026-16634

cve-icon Vulnrichment

Updated: 2026-07-24T13:32:08.478Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-30T05:30:12Z

Weaknesses
  • CWE-1104

    Use of Unmaintained Third Party Components

  • CWE-1395

    Dependency on Vulnerable Third-Party Component