{"id":"CVE-2026-113726","revision":null,"records":[{"revision":"90200c5ad8134a6981460644648d2f01","observedAt":"2026-10-27T22:45:55.385+00:00","statement":{"source":"cve-program","id":"CVE-2026-113726","aliases":[],"title":"virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST","description":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4, it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.","state":0,"publishedAt":"2026-10-20T22:05:24.253+00:00","modifiedAt":"2026-10-27T21:31:29.377+00:00","affected":[{"ecosystem":"Vendor product","name":"virtualenv","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"pypa\",\n                    \"product\": \"virtualenv\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 21.14.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://github.com/pypa/virtualenv/security/advisories/GHSA-5vjq-rrrf-7h2q","https://github.com/pypa/virtualenv/commit/5b915367da82bd024b2a0d28d2f98007034b4aa2","https://github.com/pypa/virtualenv/releases/tag/21.14.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113726","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-113726","identifiers":["CVE-2026-113726"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c212a40a511a4951adc0bec55822365e","complete":true,"records":13567,"lastAttemptAt":"2026-10-31T18:05:29.7469906+00:00","lastSuccessAt":"2026-10-31T18:05:29.742+00:00","error":null,"lastVerifiedAt":"2026-10-31T18:05:29.742+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13637,"expectedIdentifiers":13637,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-31T18:04:58.6482428+00:00","complete":true,"records":1094,"lastAttemptAt":"2026-10-31T18:04:58.6482428+00:00","lastSuccessAt":"2026-10-31T18:04:58.7872654+00:00","error":null,"lastVerifiedAt":"2026-10-31T18:04:58.7872657+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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