{"id":"CVE-2023-24824","summary":"Quadratic complexity may lead to a denial of service in cmark-gfm","details":"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 `\u003e` 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.","aliases":["GHSA-66g8-4hjf-77xh","HSEC-2025-0007"],"modified":"2026-04-02T08:49:21.055275Z","published":"2023-03-31T22:01:18.220Z","related":["ALSA-2025:8427"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400","CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24824.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24824.json"},{"type":"ADVISORY","url":"https://github.com/github/cmark-gfm/security/advisories/GHSA-66g8-4hjf-77xh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-24824"},{"type":"FIX","url":"https://github.com/github/cmark-gfm/commit/2300c1bd2c8226108885bf019655c4159cf26b59"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/github/cmark-gfm","events":[{"introduced":"0"},{"fixed":"dcf6b3862d2885b7d3dcdfc5b30c6a73526be32c"}]}],"versions":["0.27.1.gfm.0","0.27.1.gfm.1","0.27.1.gfm.2","0.27.1.gfm.3","0.27.1.gfm.4","0.28.0.gfm.10","0.28.0.gfm.11","0.28.0.gfm.5","0.28.0.gfm.6","0.28.0.gfm.7","0.28.0.gfm.8","0.28.0.gfm.9","0.28.3.gfm.12","0.28.3.gfm.13","0.28.3.gfm.14","0.28.3.gfm.15","0.28.3.gfm.16","0.28.3.gfm.17","0.28.3.gfm.18","0.28.3.gfm.19","0.28.3.gfm.20","0.28.3.gfm.21","0.29.0.gfm.0","0.29.0.gfm.1","0.29.0.gfm.2","0.29.0.gfm.3","0.29.0.gfm.4","0.29.0.gfm.5","0.29.0.gfm.6","0.29.0.gfm.7","0.29.0.gfm.8","0.29.0.gfm.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-24824.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}