CVE-2026-2297

Medium

Open

TLP:CLEAR

SourcelessFileLoader does not use io.open_code()

NVD CVE.org

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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.

Details

CVSS Score: 5.7
EPSS Score ⓘ: 0.21%

11.6th percentile
CVSS Vector: 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
Confidence: 90%
Published: Mar 4, 2026
Last Modified: Aug 13, 2026

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