{"id":"UBUNTU-CVE-2026-102937","details":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, BatchActivator.quote() returns prompt text unchanged before activate.bat inserts it into a cmd.exe set \"VAR=value\" statement. An attacker who influences --prompt, VIRTUALENV_PROMPT, or the corresponding configuration value can include a double quote that closes the assignment and leaves following cmd.exe operators as executable syntax. When a user activates the generated Windows environment, the injected commands run with that user's privileges. This issue is fixed in version 21.7.12.","modified":"2026-10-01T00:21:06.167855208Z","published":"2026-09-29T21:17:00Z","upstream":["CVE-2026-102937"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-102937"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-102937"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/commit/d721ff140ce4afdc2a9b76751e4584e25d9fbea6"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/pull/3250"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/releases/tag/21.7.12"},{"type":"REPORT","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2q"}],"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-2026-102937.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-2026-102937.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_name":"virtualenv","binary_version":"15.1.0+ds-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102937.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_name":"virtualenv","binary_version":"20.0.17-1ubuntu0.4+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102937.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_version":"20.13.0+ds-2ubuntu0.1~esm1","binary_name":"virtualenv"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102937.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-2026-102937.json"}},{"package":{"name":"python-virtualenv","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/python-virtualenv?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["20.31.2+ds-1","20.35.3+ds-1","20.35.4+ds-1","20.36.1+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-virtualenv","binary_version":"20.36.1+ds-1"},{"binary_version":"20.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