CVE-2025-6075

If the value passed to os.path.expandvars() is user-controlled a performance degradation is possible when expanding environment variables.

CVSS 4.0

1.8CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)

CWE

CWE-400

Published

2025-10-31

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• python:python

References

• https://github.com/python/cpython/commit/2e6150adccaaf5bd95d4c19dfd04a36e0b325d8c
• https://github.com/python/cpython/commit/5dceb93486176e6b4a6d9754491005113eb23427
• https://github.com/python/cpython/commit/631ba3407e3348ccd56ce5160c4fb2c5dc5f4d84
• https://github.com/python/cpython/commit/892747b4cf0f95ba8beb51c0d0658bfaa381ebca
• https://github.com/python/cpython/commit/9ab89c026aa9611c4b0b67c288b8303a480fe742

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