{"id":"CVE-2020-23478","aliases":["GHSA-x38q-xg2h-rxgx","PYSEC-2021-338"],"url":"https://o3.security/vulnerability/CVE-2020-23478","summary":"Regular Expression Denial of Service in Leo Editor","details":"Leo Editor v6.2.1 was discovered to contain a regular expression denial of service (ReDoS) vulnerability in the component plugins/importers/dart.py.","published":"2021-09-22T20:15:08.077Z","modified":"2026-07-08T20:43:00.988748Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"leo","fixedVersion":"6.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://cwe.mitre.org/data/definitions/1333.html"},{"type":"FIX","url":"https://github.com/leo-editor/leo-editor/issues/1597"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:43:00.988748Z"}}