CVE-2026-102937

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.

• CWE-78

• https://github.com/pypa/virtualenv/commit/d721ff140ce4afdc2a9b76751e4584e25d9fbea6
• https://github.com/pypa/virtualenv/pull/3250
• https://github.com/pypa/virtualenv/releases/tag/21.7.12
• https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2q

Published

Sep 29, 2026

Last Modified

Oct 2, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-10292A vulnerability was detected in UTT HiPER 1200GW up to 2.5.3…8.8
• CVE-2026-102923SparkyFitness is a self-hosted, AI-powered health and fitnes…5.4
• CVE-2026-102925virtualenv is a tool for creating isolated virtual python en…7.8
• CVE-2026-102927HedgeDoc is an open source, real-time collaborative markdown…5.9
• CVE-2026-10293A flaw has been found in UTT HiPER 1200GW up to 2.5.3-170306…8.8
• CVE-2026-102930virtualenv is a tool for creating isolated virtual python en…7.7
• CVE-2026-102938virtualenv is a tool for creating isolated virtual python en…5.8
• CVE-2026-10294A vulnerability has been found in PackageKit up to 1.3.5. Af…4.3
• CVE-2026-102940OpenEMR is a free and open source electronic health records …9.6
• CVE-2026-102941The package github.com/gomarkdown/markdown is a Go library f…7.5
• CVE-2026-102943Dagu is a workflow engine with a built-in Web user interface…6.5
• CVE-2026-102944cpp-httplib is a C++ header-only HTTP/HTTPS library. Prior t…7.5