{"id":"CVE-2026-57179","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-57179","generatedAt":"2026-10-28T02:23:52.935Z","title":"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.","description":"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.","published":"2026-09-24T18:17:15.000Z","lastModified":"2026-09-30T17:23:09.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"},"cwe":["CWE-384"],"affected":[],"epss":{"score":0.00158,"percentile":0.04892,"date":"2026-10-26","history":[{"date":"2026-09-25","score":0.00158,"percentile":0.04184}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-24T18:17:15.000Z","detail":{"score":"4.2","severity":"MEDIUM","publishedAt":"2026-09-24T18:17:15.120Z"},"summary":"New CVE, medium severity (CVSS 4.2)."}],"references":[{"url":"https://github.com/python-social-auth/social-core/security/advisories/GHSA-vqg6-3fw6-j9jg","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-57179","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}