CVE-2026-2297CWE-668

CVE-2026-2297

published March 5, 2026

CVSS
5.7
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.7 · NONE
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-668 · Exposure of Resource to Wrong Sphere
Published
2026-03-05T04:16Z
References (9)
https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e · [email protected]https://github.com/python/cpython/commit/69ddd9bb2cc4bd69b1565647c18659c6a789ccd9 · [email protected]https://github.com/python/cpython/commit/876858c9f65d9ab656c7fa639f268ce7856d89dd · [email protected]https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e · [email protected]https://github.com/python/cpython/commit/c70adad78caeeea33f92f560ecb93331ca11bf66 · [email protected]https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86 · [email protected]https://github.com/python/cpython/issues/145506 · [email protected]https://github.com/python/cpython/pull/145507 · [email protected]http://www.openwall.com/lists/oss-security/2026/03/05/6 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 04 MAR 22:10Z
    SourcelessFileLoader does not use io.open_code()
    cvelistv5