{"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":"2026-02-23T01:51:48.391490Z","published":"2022-07-25T23:15:07.837Z","related":["openSUSE-SU-2024:12350-1","openSUSE-SU-2024:13453-1","openSUSE-SU-2025:14637-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/"},{"type":"ADVISORY","url":"https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"},{"type":"ADVISORY","url":"https://github.com/lepture/mistune/releases"},{"type":"FIX","url":"https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lepture/mistune","events":[{"introduced":"0"},{"fixed":"a6d43215132fe4f3d93f8d7e90ba83b16a0838b2"}]}],"versions":["v0.1.0","v0.2.0","v0.3.0","v0.3.1","v0.4","v0.4.1","v0.5","v0.5.1","v0.6","v0.7","v0.7.1","v0.7.2","v0.7.3","v0.7.4","v0.8","v0.8.1","v0.8.2","v0.8.3","v0.8.4","v2.0.0","v2.0.0a1","v2.0.0a2","v2.0.0a3","v2.0.0a4","v2.0.0a5","v2.0.0a6","v2.0.0rc1","v2.0.1","v2.0.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-34749.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}