CVE-2023-24824

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of `>` or `-` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources.

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

1.04% chance of exploitation in the next 30 days, 62th percentile

Published

2023-03-31

Updated

2025-02-11

Proof-of-concept exploits (1)

• github/cmark-gfm/security/advisories/GHSA-66g8-4hjf-77xh

References

• CVE Record
• NVD entry

Related

• CVE-2023-2482
• CVE-2023-24871
• CVE-2023-24816
• CVE-2023-2488
• CVE-2023-24815
• CVE-2023-2489