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 The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.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

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cktan/tomlc17
https://github.com/cktan/tomlc99/issues/97
https://metacpan.org/release/FELIPE/TOML-XS-0.06/changes
https://raw.githubusercontent.com/cktan/tomlc99/29076dfd095bbbbd50a3c1b2760d29f4b83e74ac/README.md
https://toml.io/en/v1.0.0
http://www.openwall.com/lists/oss-security/2026/07/24/4
https://github.com/cktan/tomlc99/issues/97

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-24 10:16

Updated : 2026-07-27 18:16

NVD link : CVE-2026-16634

Mitre link : CVE-2026-16634

CVE.ORG link : CVE-2026-16634

JSON object : View

Products Affected

No product.

CWE

CWE-1104

Use of Unmaintained Third Party Components

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