CVE-2026-16634
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk52th percentile - higher than 52% of all known CVEs
Summary
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 The tomlc99 library is no longer maintained and has an uncontrolled recursion vulnerability. Any caller that passes untrusted TOML to from_toml risks a stack overflow from a deeply-nested document.
Risk Assessment
Processing untrusted TOML data can cause application crashes due to stack overflow, potentially leading to a denial of service attack.
Recommendation
Update TOML::XS to version 0.06 or later, which uses the tomlc17 library.
Original NVD description (English source)
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 The tomlc99 library is no longer maintained, and has an uncontrolled recursion vulnerability publicly reported in the issue tracker.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.