CVE-2023-22486

cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service

State: Published
Severity: 3.5 Low
Published: Jan 24, 2023
Updated: Mar 10, 2025
Reserved: Dec 29, 2022

Description

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions prior to 0.29.0.gfm.7 contain a polynomial time complexity issue in handle_close_bracket that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.

Scores

CVSS	Score	Vector	Source
3.1	3.5 Low	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption
CWE-407 Inefficient Algorithmic Complexity

Affected Products

Product	Versions
cmark-gfmgithub	< 0.29.0.gfm.7Affected

References

https://github.com/github/cmark-gfm/security/advisories/GHSA-r572-jvj2-3m8p

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