CVE-2026-113725: Poetry · virtualenv bash activate runs commands from an environment name with a backslash before $
Affects poetrySource GCVE Database
Not known to be exploited · CVSS 7.8 High : upgrade to 2.5.1_1 or 1.2.2_1 soon.
Data as of 30 Oct 2026, 08:17 UTC
- Patch
- Available – fixed in 2.5.1_1, 1.2.2_1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 20 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade poetry to 2.5.1_1 or 1.2.2_1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Homebrewpoetrypkg:brew/poetryOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Apply the official patch by upgrading Poetry's virtualenv component to version 1.2.2_1 or 2.5.1_1 or later, where the issue is fixed. Alternatively, set the environment variable VIRTUAL_ENV_DISABLE_PROMPT=1 before sourcing the activate script to prevent modification of PS1. Another mitigation is to disable bash prompt variable expansion by running 'shopt -u promptvars' if prompt expansion is not needed. Always verify the environment name before sourcing activate scripts from untrusted sources.
Description
A command injection vulnerability exists in the bash activate script of virtual environments created by Poetry's virtualenv component. The vulnerability arises because the environment name is not properly escaped during both passes bash makes over the PS1 prompt variable, allowing specially crafted environment names containing backslash-dollar sequences to execute arbitrary commands each time the shell prompt is drawn. This affects users who source the activate script of an environment with an attacker-controlled name. The issue is fixed in Poetry virtualenv versions 1.2.2_1 and 2.5.1_1.
References
- github.com/pypa/virtualenv/security/advisories/GHSA-vxj4-q4g9-crj7 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-113725 (opens in a new tab)
- github.com/pypa/virtualenv/commit/c3104e02474b652832a9bbaae79f6e1696296932 (opens in a new tab)
- github.com/pypa/virtualenv (opens in a new tab)
- github.com/pypa/virtualenv/releases/tag/21.14.7 (opens in a new tab)