{"id":"CVE-2026-6357","aliases":["GHSA-jp4c-xjxw-mgf9","PYSEC-2026-2876"],"url":"https://o3.security/vulnerability/CVE-2026-6357","summary":"pip self-update functionality can import newly installed modules after wheel installation","details":"pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python modules names. These module imports were intentionally deferred to increase startup time of the pip CLI. The patch changes self-update functionality to run before wheels are installed to prevent newly-installed modules from being imported shortly after the installation of a wheel package. Users should still review package contents prior to installation.","published":"2026-04-27T14:19:47.657Z","modified":"2026-09-04T18:25:58.441299638Z","cvss":null,"epss":{"score":0.00138,"percentile":0.03567,"asOf":"2026-09-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pip","fixedVersion":"26.1"}],"fix":{"url":"https://github.com/pypa/pip/pull/13923","label":"pypa/pip#13923"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/27/7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6357.json"},{"type":"ADVISORY","url":"https://ichard26.github.io/blog/2026/04/whats-new-in-pip-26.1/#security-fixes"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6357"},{"type":"FIX","url":"https://github.com/pypa/pip/pull/13923"},{"type":"PACKAGE","url":"https://github.com/pypa/pip"},{"type":"PACKAGE","url":"https://pypi.org/project/pip"},{"type":"WEB","url":"https://github.com/pypa/pip/commit/b369bfc96cc524e00c267e1693290e6599c36bad"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-04T18:25:58.441299638Z"}}