{"id":"CVE-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":["GHSA-cx6f-vjhg-g3cc"],"modified":"2026-10-25T02:45:37.278505293Z","published":"2026-10-23T19:34:46.391Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115586.json","unresolved_ranges":[{"extracted_events":[{"strategy":"StringRangeExpression","range":[{"introduced":"21.14.9"},{"fixed":"21.14.13"}],"source":"AFFECTED_FIELD"}]},{"extracted_events":[{"range":[{"fixed":"21.14.13"}],"source":"DESCRIPTION"}]}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-78"]},"references":[{"type":"WEB","url":"https://github.com/pypa/virtualenv/releases/tag/21.14.13"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115586.json"},{"type":"ADVISORY","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115586"},{"type":"FIX","url":"https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4"},{"type":"FIX","url":"https://github.com/pypa/virtualenv/pull/3466"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pypa/virtualenv","events":[{"introduced":"0"},{"fixed":"3598e201f6f044e389136b2347a8a919ac03c5f4"},{"fixed":"6accbd5ee857f6d7a5a59b1bd3db25cd5f04174a"}],"database_specific":{"extracted_events":[{"range":[{"fixed":"3598e201f6f044e389136b2347a8a919ac03c5f4"}],"source":"REFERENCES_COMMIT"},{"original_tag":"21.14.13","range":[{"fixed":"6accbd5ee857f6d7a5a59b1bd3db25cd5f04174a"}],"source":"REFERENCES_TAG"}]}}],"versions":["21.14.12","21.14.11","21.14.10","21.14.9","21.14.8","21.14.7","21.14.6","21.14.5","21.14.4","21.14.3","21.14.2","21.14.1","21.14.0","21.13.0","21.12.1","21.12.0","21.11.1","21.11.0","21.10.0","21.9.1","21.9.0","21.8.1","21.8.0","21.7.16","21.7.15","21.7.14","21.7.13","21.7.12","21.7.11","21.7.10","21.7.9","21.7.8","21.7.7","21.7.6","21.7.5","21.7.4","21.7.3","21.7.2","21.7.1","21.7.0","21.6.1","21.6.0","21.5.2","21.5.1","21.5.0","21.4.3","21.4.2","21.4.1","21.4.0","21.3.3","21.3.2","21.3.1","21.3.0","21.2.4","21.2.3","21.2.2","21.2.1","21.2.0","21.1.0","21.0.0","20.39.1","20.39.0","20.38.0","20.37.0","20.27.3","20.27.2","20.24.3","20.3.0","20.0.32","20.0.7","20.0.0b2","20.0.0b1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115586.json"}}],"schema_version":"1.9.0","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"}]}