{"id":"BIT-virtualenv-2026-115586","summary":"virtualenv: Bash activator leaves the --prompt value unescaped in PS1 when promptvars is off, so prompt expansion later executes it (regression in 21.14.9)","details":"virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.","aliases":["CVE-2026-115586","GHSA-cx6f-vjhg-g3cc"],"modified":"2026-10-29T10:55:32.724606632Z","published":"2026-10-29T09:00:47.839Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:virtualenv:virtualenv:*:*:*:*:*:python:*:*"]},"references":[{"type":"WEB","url":"https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/pull/3466"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/releases/tag/21.14.13"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115586"}],"affected":[{"package":{"name":"virtualenv","ecosystem":"Bitnami","purl":"pkg:bitnami/virtualenv"},"ranges":[{"type":"SEMVER","events":[{"introduced":"21.14.9"},{"fixed":"21.14.13"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/virtualenv/BIT-virtualenv-2026-115586.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.2"}