CVE-2026-113713

virtualenv is a tool for creating isolated virtual python environments. From 21.14.8 until 21.14.10, the app-data seeder can leave an environment linked to temporary package files that virtualenv deletes when creation finishes. The environment-variable and configuration-file forms of symlink_app_data can enable this state even though the command-line flag is disabled for temporary app-data. The resulting environment depends on a cache pathname that its owner no longer controls. This issue is fixed in version 21.14.10.

CVSS 4.0

4.4CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

EPSS

0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)

CWE

CWE-377

Published

2026-10-20

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

Packages (OSV)

References

• https://github.com/pypa/virtualenv/commit/b81995c3feab9e1edb453c75ffc6616e1a77335e
• https://github.com/pypa/virtualenv/pull/3437
• https://github.com/pypa/virtualenv/releases/tag/21.14.10
• https://github.com/pypa/virtualenv/security/advisories/GHSA-4f8h-vr72-p32c

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