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CVE-2026-2297 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-2297

CVE-2026-2297

MEDIUM5.7

SourcelessFileLoader does not use io.open_code()

Published Mar 4, 2026

Modified 1 weeks ago

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.

References

http://www.openwall.com/lists/oss-security/2026/03/05/6

https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e

https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e

https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86

https://github.com/python/cpython/issues/145506

https://github.com/python/cpython/pull/145507

https://www.cve.org/CVERecord?id=CVE-2026-2297

CVSS Analysis

CVSS v4.0

5.7

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Attack Requirements

PresentAT:P

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

HighVI:H

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

5.7/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

Ecosystems

Timeline

PublishedMar 4, 2026

ModifiedApr 7, 2026