{"action":"Upgrade python to 3.13.10 (3.13.x) or 3.14.1 (3.14.x) or later.","affected":[{"fixed":"3.13.10","introduced":"0"},{"fixed":"3.14.1","introduced":"3.14.0"}],"component":"python","cve_ids":["CVE-2025-12781"],"ecosystem":"python","exploited":false,"fixed_versions":["3.13.10","3.14.1"],"id":"tcs_01M5JTPB9H27EECVFETNW4ZNVB","modified_at":"2026-01-22T20:12:56Z","published_at":"2026-01-21T19:34:47Z","references":["https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2026-7.json","https://mail.python.org/archives/list/security-announce@python.org/thread/KRI7GC6S27YV5NJ4FPDALS2WI5ENAFJ6/","https://www.cve.org/CVERecord?id=CVE-2025-12781"],"severity":{"label":"medium","score":6.3},"sources":[{"source":"python-runtime","source_id":"PSF-2026-7","url":"https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2026-7.json"}],"summary":"base64.b64decode() always accepts \"+/\" characters, despite setting altchars"}