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Vulnerability record · CVE-2025-6075 · published 31 October 2025

CVE-2025-6075: Python uncontrolled resource consumption vulnerability

Python · Python

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

1.8 CVSS 4.0 Low EPSS 0.15% · top 95.8% CWE-400 · Uncontrolled resource consumption
1.8CVSS 4.0 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
7 Oct 2026Last modified by NVD

Description

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

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/python/cpython/commit/2e6150adccaaf5bd95d4c19dfd04a36e0b325d8c Patch
https://github.com/python/cpython/commit/5dceb93486176e6b4a6d9754491005113eb23427 Patch
https://github.com/python/cpython/commit/631ba3407e3348ccd56ce5160c4fb2c5dc5f4d84 Patch
https://github.com/python/cpython/commit/892747b4cf0f95ba8beb51c0d0658bfaa381ebca Patch
https://github.com/python/cpython/commit/9ab89c026aa9611c4b0b67c288b8303a480fe742 Patch
https://github.com/python/cpython/commit/c8a5f3435c342964e0a432cc9fb448b7dbecd1ba Patch
https://github.com/python/cpython/commit/f029e8db626ddc6e3a3beea4eff511a71aaceb5c Patch
https://github.com/python/cpython/issues/136065 Issue TrackingVendor Advisory
https://mail.python.org/archives/list/security-announce@python.org/thread/IUP5QJ6D4KK6ULHOMPC7DPNKRYQTQNLA/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-6075), CISA KEV, FIRST EPSS (scores of 2026-11-13). This page is refreshed as NVD updates the record.