{"action":"Upgrade python to 3.10.20 (3.10.x), 3.11.15 (3.11.x), 3.12.13 (3.12.x), 3.13.12 (3.13.x) or 3.14.3 (3.14.x) or later.","affected":[{"fixed":"3.10.20","introduced":"0"},{"fixed":"3.11.15","introduced":"3.11.0"},{"fixed":"3.12.13","introduced":"3.12.0"},{"fixed":"3.13.12","introduced":"3.13.0"},{"fixed":"3.14.3","introduced":"3.14.0"}],"component":"python","cve_ids":["CVE-2026-1299"],"ecosystem":"python","exploited":false,"fixed_versions":["3.10.20","3.11.15","3.12.13","3.13.12","3.14.3"],"id":"tcs_01M5JTP9V2CF6KMX4VW8P4M5AZ","modified_at":"2026-02-13T16:20:13Z","published_at":"2026-01-23T16:27:13Z","references":["https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2026-8.json","https://mail.python.org/archives/list/security-announce@python.org/thread/6ZZULGALJTITEAGEXLDJE2C6FORDXPBT/","https://www.cve.org/CVERecord?id=CVE-2026-1299"],"severity":{"label":"medium","score":6},"sources":[{"source":"python-runtime","source_id":"PSF-2026-8","url":"https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2026-8.json"}],"summary":"email BytesGenerator header injection due to unquoted newlines"}