Medium severity · published Oct 31, 2025
CVE-2025-6075
If the value passed to os.path.expandvars() is user-controlled a performance degradation is possible when expanding environment variables
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
If the value passed to os.path.expandvars() is user-controlled a
performance degradation is possible when expanding environment
variables.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
Python · Python
before 3.9.0; 3.13.1 before 3.13.11; 3.14.0 before 3.14.1; 3.15.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6075
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6075
Patch
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
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