CVE-2026-113776
CVE-2026-113776 · virtualenv activation scripts run code from a path that contains a placeholder name
This page contains facts from public vulnerability sources. Check the original advisory before updating.
virtualenv is a tool for creating isolated virtual python environments. From 20.26.6 until 21.14.2, ViaTemplateActivator.instantiate_template() replaces placeholders one key at a time across the complete activation template, so trigger names such as __VIRTUAL_NAME__, __VIRTUAL_ENV__, or __VIRTUAL_PROMPT__ inside an already substituted and quoted environment path or prompt can be replaced during a later pass. The later value's quoting can close the earlier literal and execute the remaining path when a user activates the environment through bash, fish, xonsh, or activate_this.py. The distinct csh prompt-display token __VIRTUAL_PROMPT_DISPLAY_TCSH__ can instead break the generated script without establishing command execution. The attacker must influence the destination path or --prompt, and a value without a relevant placeholder name does not trigger this mechanism. This issue is fixed in version 21.14.2.
CVSS 7.8 · High · EPSS 0.2% · Fix available
- Published
- Updated
Affected products and versions
virtualenv
- Versions
- >= 20.26.6, < 21.14.2: 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
- 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
- 20.30.0
- 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
- 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
- 21.2.0
- 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: ≥ 20.26.6, < 21.14.2
Update to 21.14.2
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