CVE-2026-2297

MEDIUM

CPython - Info Disclosure

Title source: llm

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.

References (8)

[Mailing List] http://www.openwall.com/lists/oss-security/2026/03/05/6

[Issue Tracking] https://github.com/python/cpython/issues/145506

[Issue Tracking] https://github.com/python/cpython/pull/145507

[Patch] https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e

View Patch ZIP pw:eip

[Patch] https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e

[Patch] https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86

[Patch] https://github.com/python/cpython/commit/69ddd9bb2cc4bd69b1565647c18659c6a789ccd9

[Patch] https://github.com/python/cpython/commit/876858c9f65d9ab656c7fa639f268ce7856d89dd

Scores

CVSS v4 5.7

EPSS 0.0002

EPSS Percentile 4.7%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-668

Status published

Products (4)

Python Software Foundation/CPython < 3.13.13

Python Software Foundation/CPython < 3.15.0a7

Python Software Foundation/CPython 3.14.0 - 3.14.4

Python Software Foundation/CPython 3.15.0a1 - 3.15.0a7

Published Mar 04, 2026

Tracked Since Mar 05, 2026