CVE-2026-113721
CVE-2026-113721 · virtualenv: Generated files can follow existing destination links
This page contains facts from public vulnerability sources. Check the original advisory before updating.
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, ViaTemplateActivator._generate() removes an existing output only when Path.exists() is true, allowing a dangling symlink to survive and redirect generated activation content, while PyEnvCfg.write() opens pyvenv.cfg without first replacing an existing symbolic or hard link. Another local account that prepares final entries inside the destination can therefore cause environment creation to create or overwrite files outside the requested tree with constrained virtualenv-generated content and the invoking user's permissions. The destination parent must remain controlled by the environment owner during creation; concurrent parent-directory replacement is a separate concern. This issue is fixed in version 21.14.9.
CVSS 4.5 · Medium · EPSS 0.1% · Fix available
- Published
- Updated
Affected products and versions
virtualenv
- Versions
- < 21.14.9: Affected
No fix published
python-virtualenv Debian:12
- Versions
- 20.17.1+ds-1
- 20.19.0+ds-1
- 20.21.0+ds-1
- 20.23.0+ds-1
- 20.23.0+ds-2
- 20.24.1+ds-1
- 20.24.6+ds-1
- 20.24.6+ds-2
- 20.25.0+ds-1
- 20.25.0+ds-2
- 20.25.1+ds-1
- 20.26.1+ds-1
- 20.26.2+ds-1
- 20.26.6+ds-1
- 20.27.0+ds-1
- 20.28.0+ds-1
- 20.29.1+ds-1
- 20.29.3+ds-1
- 20.30.0+ds-1
- 20.30.0+ds-2
- 20.30.0+ds-3
- 20.31.2+ds-1
- 20.33.1+ds-1
- 20.34.0+ds-1
- 20.35.3+ds-1
- 20.35.4+ds-1
- 20.36.1+ds-1
- 20.38.0+ds-1
- 21.2.0+ds-1
- 21.2.4+ds-1
- 21.3.1+ds-1
- 21.4.1+ds-1
- 21.5.1+ds-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Debian:13
- Versions
- 20.31.2+ds-1
- 20.31.2+ds-1+deb13u1
- 20.33.1+ds-1
- 20.34.0+ds-1
- 20.35.3+ds-1
- 20.35.4+ds-1
- 20.36.1+ds-1
- 20.38.0+ds-1
- 21.2.0+ds-1
- 21.2.4+ds-1
- 21.3.1+ds-1
- 21.4.1+ds-1
- 21.5.1+ds-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Debian:14
- Versions
- 20.31.2+ds-1
- 20.33.1+ds-1
- 20.34.0+ds-1
- 20.35.3+ds-1
- 20.35.4+ds-1
- 20.36.1+ds-1
- 20.38.0+ds-1
- 21.2.0+ds-1
- 21.2.4+ds-1
- 21.3.1+ds-1
- 21.4.1+ds-1
- 21.5.1+ds-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
virtualenv PyPI
- Versions
- 0.8
- 0.8.1
- 0.8.2
- 0.8.3
- 0.8.4
- 0.9
- 0.9.1
- 0.9.2
- 1.0
- 1.1
- 1.10
- 1.10.1
- 1.11
- 1.11.1
- 1.11.2
- 1.11.3
- 1.11.4
- 1.11.5
- 1.11.6
- 1.2
- 1.3
- 1.3.1
- 1.3.2
- 1.3.3
- 1.3.4
- 1.4
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.4.9
- 1.4rc1
- 1.5
- 1.5.1
- 1.5.2
- 1.6
- 1.6.1
- 1.6.2
- 1.6.3
- 1.6.4
- 1.7
- 1.7.1
- 1.7.1.1
- 1.7.1.2
- 1.7.2
- 1.8
- 1.8.1
- 1.8.2
- 1.8.3
- 1.8.4
- 1.9
- 1.9.1
- 12.0
- 12.0.1
- 12.0.2
- 12.0.4
- 12.0.5
- 12.0.6
- 12.0.7
- 12.1.0
- 12.1.1
- 13.0.0
- 13.0.1
- 13.0.2
- 13.0.3
- 13.1.0
- 13.1.1
- 13.1.2
- 14.0.0
- 14.0.1
- 14.0.2
- 14.0.3
- 14.0.4
- 14.0.5
- 14.0.6
- 15.0.0
- 15.0.1
- 15.0.2
- 15.0.3
- 15.1.0
- 15.2.0
- 16.0.0
- 16.1.0
- 16.2.0
- 16.3.0
- 16.3.1.dev0
- 16.4.0
- 16.4.1
- 16.4.3
- 16.4.4.dev0
- 16.5.0
- 16.6.0
- 16.6.1
- 16.6.2
- 16.7.0
- 16.7.1
- 16.7.10
- 16.7.11
- 16.7.12
- 16.7.2
- 16.7.3
- 16.7.4
- 16.7.5
- 16.7.6
- 16.7.7
- 16.7.8
- 16.7.9
- 20.0.0
- 20.0.0b1
- 20.0.0b2
- 20.0.1
- 20.0.10
- 20.0.11
- 20.0.12
- 20.0.13
- 20.0.14
- 20.0.15
- 20.0.16
- 20.0.17
- 20.0.18
- 20.0.19
- 20.0.2
- 20.0.20
- 20.0.21
- 20.0.22
- 20.0.23
- 20.0.24
- 20.0.25
- 20.0.26
- 20.0.27
- 20.0.28
- 20.0.29
- 20.0.3
- 20.0.30
- 20.0.31
- 20.0.32
- 20.0.33
- 20.0.34
- 20.0.35
- 20.0.4
- 20.0.5
- 20.0.6
- 20.0.7
- 20.0.8
- 20.0.9
- 20.1.0
- 20.10.0
- 20.11.0
- 20.11.1
- 20.11.2
- 20.12.0
- 20.12.1
- 20.13.0
- 20.13.1
- 20.13.2
- 20.13.3
- 20.13.4
- 20.14.0
- 20.14.1
- 20.15.0
- 20.15.1
- 20.16.0
- 20.16.1
- 20.16.2
- 20.16.3
- 20.16.4
- 20.16.5
- 20.16.6
- 20.16.7
- 20.17.0
- 20.17.1
- 20.18.0
- 20.19.0
- 20.2.0
- 20.2.1
- 20.2.2
- 20.20.0
- 20.21.0
- 20.21.1
- 20.22.0
- 20.23.0
- 20.23.1
- 20.24.0
- 20.24.1
- 20.24.2
- 20.24.3
- 20.24.4
- 20.24.5
- 20.24.6
- 20.24.7
- 20.25.0
- 20.25.1
- 20.25.2
- 20.25.3
- 20.26.0
- 20.26.1
- 20.26.2
- 20.26.3
- 20.26.4
- 20.26.5
- 20.26.6
- 20.27.0
- 20.27.1
- 20.28.0
- 20.28.1
- 20.29.0
- 20.29.1
- 20.29.2
- 20.29.3
- 20.3.0
- 20.3.1
- 20.30.0
- 20.31.0
- 20.31.1
- 20.31.2
- 20.32.0
- 20.33.0
- 20.33.1
- 20.34.0
- 20.35.0
- 20.35.1
- 20.35.2
- 20.35.3
- 20.35.4
- 20.36.0
- 20.36.1
- 20.38.0
- 20.39.0
- 20.39.1
- 20.4.0
- 20.4.1
- 20.4.2
- 20.4.3
- 20.4.4
- 20.4.5
- 20.4.6
- 20.4.7
- 20.5.0
- 20.6.0
- 20.7.0
- 20.7.1
- 20.7.2
- 20.8.0
- 20.8.1
- 20.9.0
- 21.0.0
- 21.1.0
- 21.10.0
- 21.11.0
- 21.11.1
- 21.12.0
- 21.12.1
- 21.13.0
- 21.14.0
- 21.14.1
- 21.14.2
- 21.14.3
- 21.14.4
- 21.14.5
- 21.14.6
- 21.14.7
- 21.14.8
- 21.2.0
- 21.2.1
- 21.2.2
- 21.2.3
- 21.2.4
- 21.3.0
- 21.3.1
- 21.3.2
- 21.3.3
- 21.4.0
- 21.4.1
- 21.4.2
- 21.4.3
- 21.5.0
- 21.5.1
- 21.5.2
- 21.6.0
- 21.6.1
- 21.7.0
- 21.7.1
- 21.7.10
- 21.7.11
- 21.7.12
- 21.7.13
- 21.7.14
- 21.7.15
- 21.7.16
- 21.7.2
- 21.7.3
- 21.7.4
- 21.7.5
- 21.7.6
- 21.7.7
- 21.7.8
- 21.7.9
- 21.8.1
- 21.9.0
- 21.9.1
- Affected ranges
- ECOSYSTEM: < 21.14.9
Update to 21.14.9
python-virtualenv Ubuntu:14.04:LTS
- Versions
- 1.10.1-1
- 1.11-1
- 1.11-2
- 1.11.4-1
- 1.11.4-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:16.04:LTS
- Versions
- 1.11.6+ds-1
- 14.0.5+ds-1
- 14.0.5+ds-2
- 14.0.5+ds-4
- 15.0.0+ds-1
- 15.0.0+ds-2
- 15.0.1+ds-1
- 15.0.1+ds-2
- 15.0.1+ds-3
- 15.0.1+ds-3ubuntu1
- 15.0.1+ds-3ubuntu1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:18.04:LTS
- Versions
- 15.1.0+ds-1
- 15.1.0+ds-1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:Pro:20.04:LTS
- Versions
- 15.1.0+ds-2
- 15.1.0+ds-2build1
- 15.1.0+ds-2ubuntu1
- 20.0.13-1
- 20.0.17-1
- 20.0.17-1ubuntu0.3
- 20.0.17-1ubuntu0.4
- 20.0.17-1ubuntu0.4+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:Pro:22.04:LTS
- Versions
- 20.4.6+ds-2
- 20.10.0+ds-1
- 20.12.1+ds-1
- 20.13.0+ds-1
- 20.13.0+ds-2
- 20.13.0+ds-2ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:Pro:24.04:LTS
- Versions
- 20.24.1+ds-1
- 20.24.6+ds-1
- 20.24.6+ds-2
- 20.25.0+ds-1
- 20.25.0+ds-2
- 20.25.0+ds-2ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:26.10
- Versions
- 20.36.1+ds-1
- 21.4.1+ds-1
- 21.5.1+ds-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
python-virtualenv Ubuntu:26.04:LTS
- Versions
- 20.31.2+ds-1
- 20.35.3+ds-1
- 20.35.4+ds-1
- 20.36.1+ds-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/pypa/virtualenv/security/advisories/GHSA-558c-9hv2-4prj
- https://github.com/pypa/virtualenv/pull/3431
- https://github.com/pypa/virtualenv/commit/d25f28699eefb1fc34a251e5adf2b5de844c36cd
- https://github.com/pypa/virtualenv/releases/tag/21.14.9
- https://nvd.nist.gov/vuln/detail/CVE-2026-113721