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CVE-2025-6075

Quadratic complexity in os.path.expandvars() with user-controlled template

Published: Oct 31, 2025Updated: Feb 4, 2026 Sources: CVE List NVD BDUCWE-400
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.1%
Top 97.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-400

Affected Products

CPythonPython Software FoundationOSS Libraries
pythonpythonOSS Libraries
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
OpenShift Dev SpacesRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
python software foundationoss-projectUSOSS Librariesaka python software foundation, psf
pythonoss-projectUSOSS Libraries
red hat inc.commercialUSOperating Systemsaka red hat
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 7 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/python/cpython/issues/136065
github.com
https://mail.python.org/archives/list/security-announce@python.org/thread/IUP5QJ6D4KK6ULHOMPC7DPNKRYQTQNLA/
mail.python.org
https://github.com/python/cpython/commit/2e6150adccaaf5bd95d4c19dfd04a36e0b325d8c
github.com
and 9 more references View all →

Timeline

Published
Oct 31, 2025
Last Updated
Feb 4, 2026

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