{"id":"CVE-2026-102938","title":"virtualenv is a tool for creating isolated virtual python environments","summary":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write() writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg._read_values() parses the file with str.splitl…","severity":"medium","cvss":5.8,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-93"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.7.11"],"published":"2026-09-29","updated":"2026-09-30","sourceUpdated":"2026-09-30T20:17:25.517","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102938","references":[{"url":"https://github.com/pypa/virtualenv/commit/a30f995461043acb6cacbf3a890951563ccf7140","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/pull/3247","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/releases/tag/21.7.11","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-9h9j-4vrj-gf7g","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102938"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/virtualenv/PYSEC-2026-4012.yaml"},{"url":"https://pypi.org/project/virtualenv"},{"url":"https://github.com/advisories/GHSA-9h9j-4vrj-gf7g"},{"url":"https://github.com/pypa/virtualenv"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102938.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102938"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544266"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102938"},{"url":"https://access.redhat.com/errata/RHSA-2026:84734"}],"tags":["nvd","cve.org","ghsa","pip","osv","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-30T19:53:10.688613Z"},"cvssSource":"cna","epss":0.00146,"epssPercentile":0.03826,"ingestedAt":"2026-09-29T21:49:08.217Z","aliases":["GHSA-9h9j-4vrj-gf7g","PYSEC-2026-4012","BIT-virtualenv-2026-102938"],"ecosystem":"pip","patched":["virtualenv 21.7.11"],"scores":{"cna":5.8,"vendor":7},"slug":"CVE-2026-102938","body":"## Overview\n\nvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write() writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg._read_values() parses the file with str.splitlines() and accepts the last value for duplicate keys. An attacker who influences --prompt, VIRTUALENV_PROMPT, or configuration input can insert a recognized line boundary and additional keys, including home, causing consumers to use an attacker-selected base interpreter or corrupted environment metadata. The security impact requires prompt input from outside the operator's trust boundary; directly supplied prompt content primarily corrupts the operator's own environment. This issue is fixed in version 21.7.11.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-102938)\n\nAffected packages:\n\n- `virtualenv <= 21.7.10`\n\nPatched in:\n\n- `virtualenv 21.7.11`\n\nSource: https://github.com/advisories/GHSA-9h9j-4vrj-gf7g\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 8, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Dev Spaces, Red Hat Satellite 6, … · no fix planned: Red Hat Ansible Automation Platform 2, OpenShift Lightspeed, Red Hat Enterprise Linux 8, Red Hat OpenShift AI (RHOAI), … · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102938.json)\n- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":31.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}