CVE-2026-2297
SourcelessFileLoader does not use io.open_code()
- State
- Published
- Severity
- 5.7 Medium
- Published
- Mar 4, 2026
- Updated
- Aug 13, 2026
- Reserved
- Feb 10, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.7 Medium | 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 | PSF |
Weaknesses
- CWE-668 Exposure of Resource to Wrong Sphere
Affected Products
| Product | Versions |
|---|---|
CPythonPython Software Foundation |
|
References
- https://github.com/python/cpython/issues/145506issue-tracking
- https://github.com/python/cpython/pull/145507patch
- https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603epatch
- https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535epatch
- https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86patch
- https://github.com/python/cpython/commit/69ddd9bb2cc4bd69b1565647c18659c6a789ccd9patch
- https://github.com/python/cpython/commit/876858c9f65d9ab656c7fa639f268ce7856d89ddpatch
- https://github.com/python/cpython/commit/c70adad78caeeea33f92f560ecb93331ca11bf66patch
- http://www.openwall.com/lists/oss-security/2026/03/05/6
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.