{"id":"CVE-2026-57179","summary":"social-auth-core has a Session Fixation issue","details":"Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the partial-pipeline resume mechanism accepted `partial_token` as a bearer credential without binding it to the browser session that created it. Applications using resumable partial pipeline steps could allow an attacker to start an authentication flow, obtain a valid partial token and verification data, and cause a victim's browser to resume that attacker-controlled flow. This could authenticate the victim's browser as the attacker's account. The issue affects applications using partial pipeline steps such as `mail_validation` or custom steps decorated with `@partial`. The issue has been fixed in version 5.0.0 by binding partial pipeline resumes to the originating browser session.","aliases":["GHSA-vqg6-3fw6-j9jg"],"modified":"2026-09-26T03:30:46.412790239Z","published":"2026-09-24T17:27:00.152Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-384"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57179.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57179.json"},{"type":"ADVISORY","url":"https://github.com/python-social-auth/social-core/security/advisories/GHSA-vqg6-3fw6-j9jg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57179"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python-social-auth/social-core","events":[{"introduced":"0"},{"fixed":"29dffe68c7c23f3d5cb5e051e7cb40447ffb55d5"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"5.0.0"}],"source":"AFFECTED_FIELD"}}],"versions":["4.9.1","4.9.0","4.8.7","4.8.6","4.8.5","4.8.4","4.8.3","4.8.2","4.8.1","4.8.0","4.7.0","4.6.1","4.6.0","4.5.6","4.5.5","4.5.4","4.5.3","4.5.2","4.5.1","4.5.0","4.4.2","4.4.1","4.4.0","4.3.0","4.2.0","4.1.0","4.0.3","4.0.2","4.0.1","4.0.0","3.4.0","3.3.3","3.1.0","3.3.2","3.3.1","3.3.0","3.2.0","3.0.0","2.0.0","1.7.0","1.6.0","1.5.0","1.4.0","1.3.0","1.2.0","1.1.0","1.0.1","0.2.1","0.2.0","0.1.0","0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57179.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}