{"id":"CVE-2026-102930","state":"PUBLISHED","title":"virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use","description":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.","publishedAt":"2026-09-29T20:53:36.018Z","updatedAt":"2026-09-30T14:02:24.390Z","severity":{"score":7.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["pypa virtualenv"],"affected":[{"vendor":"pypa","product":"virtualenv","versions":[{"version":"< 21.7.12","status":"affected"}]}],"references":["https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45","https://github.com/pypa/virtualenv/pull/3251","https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"],"weaknesses":["CWE-494"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102930.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102930","state":"PUBLISHED","datePublished":"2026-09-29T20:53:36.018Z","dateUpdated":"2026-09-30T14:02:24.390Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-29T20:24:43.340Z"},"containers":{"cna":{"title":"virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use","descriptions":[{"lang":"en","value":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12."}],"affected":[{"vendor":"pypa","product":"virtualenv","versions":[{"version":"< 21.7.12","status":"affected"}]}],"references":[{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45","name":"https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pypa/virtualenv/pull/3251","name":"https://github.com/pypa/virtualenv/pull/3251","tags":["x_refsource_MISC"]},{"url":"https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d","name":"https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-494","lang":"en","description":"CWE-494: Download of Code Without Integrity Check","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-29T20:53:36.018Z"},"source":{"advisory":"GHSA-94p9-xgh2-xp45","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T14:02:14.766019Z","id":"CVE-2026-102930","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T14:02:24.390Z"}}]}}}