{"id":"BIT-libpython-2026-2297","summary":"SourcelessFileLoader does not use io.open_code()","details":"The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files. sys.audit handlers for this audit event therefore do not fire.","modified":"2026-03-27T08:56:26.348156230Z","published":"2026-03-06T08:43:26.501Z","withdrawn":"2026-03-27T08:47:51.954507Z","database_specific":{"cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/03/05/6"},{"type":"WEB","url":"https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e"},{"type":"WEB","url":"https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e"},{"type":"WEB","url":"https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86"},{"type":"WEB","url":"https://github.com/python/cpython/issues/145506"},{"type":"WEB","url":"https://github.com/python/cpython/pull/145507"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2297"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.15.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2026-2297.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.7.3"}