{"id":"UBUNTU-CVE-2026-115586","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.","modified":"2026-10-27T04:17:48.889265849Z","published":"2026-10-26T00:00:00Z","upstream":["CVE-2026-115586"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-115586"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-115586"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/pull/3466"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/releases/tag/21.14.13"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc"}],"affected":[{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.1-1","1.11-1","1.11-2","1.11.4-1","1.11.4-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-virtualenv","binary_version":"1.11.4-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"python-virtualenv","binary_version":"15.0.1+ds-3ubuntu1.1"},{"binary_name":"python3-virtualenv","binary_version":"15.0.1+ds-3ubuntu1.1"},{"binary_name":"virtualenv","binary_version":"15.0.1+ds-3ubuntu1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["15.1.0+ds-1","15.1.0+ds-1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"15.1.0+ds-1.1","binary_name":"python-virtualenv"},{"binary_version":"15.1.0+ds-1.1","binary_name":"python3-virtualenv"},{"binary_version":"15.1.0+ds-1.1","binary_name":"virtualenv"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-virtualenv","binary_version":"20.0.17-1ubuntu0.4+esm1"},{"binary_version":"20.0.17-1ubuntu0.4+esm1","binary_name":"virtualenv"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"20.13.0+ds-2ubuntu0.1~esm1","binary_name":"python3-virtualenv"},{"binary_name":"virtualenv","binary_version":"20.13.0+ds-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-virtualenv","binary_version":"20.25.0+ds-2ubuntu0.1~esm1"},{"binary_name":"virtualenv","binary_version":"20.25.0+ds-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115586.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.36.1+ds-1","21.4.1+ds-1","21.5.1+ds-1"],"ecosystem_specific":{"binaries":[{"binary_version":"21.5.1+ds-1","binary_name":"python3-virtualenv"},{"binary_name":"virtualenv","binary_versio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