{"action":"Upgrade waitress to 1.4.3 or later.","affected":[{"fixed":"1.4.3","introduced":"1.4.2"}],"component":"waitress","cve_ids":["CVE-2020-5236"],"ecosystem":"PyPI","epss":0.02363,"exploited":false,"fixed_versions":["1.4.3"],"ghsa_id":"GHSA-73m2-3pwg-5fgc","id":"tcs_01M5KF4PJ2HEDRCWPADR2S39AZ","modified_at":"2026-09-10T03:49:25.209471044Z","published_at":"2020-02-04T03:07:31Z","references":["https://osv.dev/vulnerability/GHSA-73m2-3pwg-5fgc","https://github.com/Pylons/waitress/security/advisories/GHSA-73m2-3pwg-5fgc","https://nvd.nist.gov/vuln/detail/CVE-2020-5236","https://github.com/Pylons/waitress/commit/6e46f9e3f014d64dd7d1e258eaf626e39870ee1f","https://github.com/Pylons/waitress","https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2020-155.yaml"],"severity":{"label":"medium","score":5.7},"sources":[{"source":"osv","source_id":"GHSA-73m2-3pwg-5fgc","url":"https://osv.dev/vulnerability/GHSA-73m2-3pwg-5fgc"}],"summary":"Catastrophic backtracking in regex allows Denial of Service in Waitress"}