{"id":"CVE-2022-34749","details":"In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.","aliases":["GHSA-fw3v-x4f2-v673","PYSEC-2022-237"],"modified":"2026-08-12T03:51:10.334524724Z","published":"2022-07-25T00:00:00Z","related":["openSUSE-SU-2024:12350-1","openSUSE-SU-2024:13453-1","openSUSE-SU-2025:14637-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/34xxx/CVE-2022-34749.json","cna_assigner":"mitre"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/34xxx/CVE-2022-34749.json"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-34749"},{"type":"FIX","url":"https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"},{"type":"PACKAGE","url":"https://github.com/lepture/mistune/releases"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lepture/mistune","events":[{"introduced":"0"},{"fixed":"a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.0.2"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:mistune_project:mistune:*:*:*:*:*:*:*:*"}}],"versions":["v2.0.2","v2.0.1","v2.0.0","v2.0.0rc1","v2.0.0a6","v2.0.0a5","v2.0.0a4","v2.0.0a3","v2.0.0a2","v2.0.0a1","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7","v0.6","v0.5.1","v0.5","v0.4.1","v0.4","v0.3.1","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-34749.json"}}],"schema_version":"1.9.0"}