{"id":"CVE-2023-33595","aliases":["BELL-CVE-2023-33595","BIT-libpython-2023-33595","BIT-python-2023-33595","BIT-python-min-2023-33595","EUVD-2023-37751","GHSA-pqc2-g93j-9599","PSF-2023-3"],"status":"published","title":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function...","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0037,"percentile":0.31163,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2023-06-07T00:00:00Z","modified":"2026-06-17T06:01:57Z","fixes":[{"ecosystem":"Bitnami","package":"libpython","fixed_in":["3.12.0-alpha8"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"python","fixed_in":["3.12.0-alpha8"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"python-min","fixed_in":["3.12.0-alpha8"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"libpython","ranges":[{"type":"SEMVER","events":[{"introduced":"3.12.0-alpha0"},{"fixed":"3.12.0-alpha8"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"python","ranges":[{"type":"SEMVER","events":[{"introduced":"3.12.0-alpha0"},{"fixed":"3.12.0-alpha8"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"python-min","ranges":[{"type":"SEMVER","events":[{"introduced":"3.12.0-alpha0"},{"fixed":"3.12.0-alpha8"}]}]}],"products":[{"vendor":"python","product":"python"}],"references":[{"url":"https://github.com/python/cpython/issues/103824","tags":["x_transferred","Issue Tracking","Vendor Advisory","web"]},{"url":"https://github.com/python/cpython/pull/103993/commits/c120bc2d354ca3d27d0c7a53bf65574ddaabaf3a","tags":["x_transferred","Patch","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-33595","tags":["web"]},{"url":"https://github.com/advisories/GHSA-pqc2-g93j-9599"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2023-33595","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-33595","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2023-06-07T00:00:00Z","modified":"2024-08-02T15:47:05.991Z","updated_at":"2026-11-02T14:35:34.170609Z"}],"euvd":[{"id":"EUVD-2023-37751","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2023-06-07T00:00:00Z","modified":"2024-08-02T15:47:05Z","updated_at":"2026-11-03T03:50:04.380287Z"}],"ghsa":[{"id":"GHSA-pqc2-g93j-9599","title":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function...","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2023-06-07T21:30:18Z","modified":"2023-12-08T18:30:37Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:55:09.695365Z"}],"nvd":[{"id":"CVE-2023-33595","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2023-06-07T20:15:09.92Z","modified":"2026-06-17T06:01:57.93Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:08:05.329837Z"}],"osv":[{"id":"BELL-CVE-2023-33595","title":"CVE-2023-33595 does not affect BellSoft software","status":"withdrawn","published":"2023-10-18T13:48:06.997796Z","modified":"2026-01-26T09:45:41.185303Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:17.742221Z"},{"id":"BIT-libpython-2023-33595","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2025-08-11T13:52:22.692Z","modified":"2025-08-11T15:13:30.621489Z","updated_at":"2026-11-02T15:28:32.162822Z"},{"id":"BIT-python-2023-33595","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2024-03-06T11:03:43.189Z","modified":"2025-08-11T15:13:30.621489Z","updated_at":"2026-11-02T15:28:34.724063Z"},{"id":"BIT-python-min-2023-33595","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2025-01-16T07:21:27.893Z","modified":"2025-08-11T15:13:30.621489Z","updated_at":"2026-11-02T15:28:34.724063Z"},{"id":"PSF-2023-3","description":"CPython v3.12.0 alpha 7 was discovered to contain a heap use-after-free via the function ascii_decode at /Objects/unicodeobject.c.","status":"published","published":"2023-06-07T00:00:00Z","modified":"2025-08-11T15:13:30.621489Z","cwes":["CWE-416"],"updated_at":"2026-11-02T15:52:50.263679Z"}]}}