What’s Vulnerable › Vulnerabilities

CVE-2026-113713: virtualenv: Temporary app-data can leave dangling seed package links

• Severity: medium (CVSS 4.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-27
• Weakness: CWE-377

Description

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.

Affected products

• pypa virtualenv: from 21.14.8, < 21.14.10

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
• https://github.com/pypa/virtualenv/security/advisories/GHSA-4f8h-vr72-p32c

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