{"cve":"CVE-2026-57175","nvd":{"published":"2026-09-24T18:17:14.523","modified":"2026-10-05T16:17:14.443","status":"Awaiting Analysis","description":"Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the SAML backend accepted SAML responses on the Assertion Consumer Service endpoint without verifying that they matched a previously issued `AuthnRequest`. Applications using SAML account association could allow an attacker with a valid account on a trusted IdP to link the attacker's SAML identity to a logged-in victim's local account. The attacker could then authenticate through SAML and gain access to the victim's account. The issue affects applications using the SAML backend together with authenticated account association. The issue has been fixed in version 5.0.0 by validating SAML responses against stored `AuthnRequest` IDs.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","score":6.4},"cwes":["CWE-287"],"references":["https://github.com/python-social-auth/social-core/security/advisories/GHSA-vq6g-g6c7-5f2j"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-57175","score":0.00228,"percentile":0.13404,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vq6g-g6c7-5f2j","url":"https://osv.dev/vulnerability/GHSA-vq6g-g6c7-5f2j","summary":"social-auth-core has an Improper Authentication issue","modified":"2026-10-01T17:56:22.305416381Z","packages":[{"ecosystem":"PyPI","name":"social-auth-core","purl":"pkg:pypi/social-auth-core","ranges":["<5.0.0"],"fixed":["5.0.0"]}]},{"id":"PYSEC-2026-4167","url":"https://osv.dev/vulnerability/PYSEC-2026-4167","summary":"social-auth-core has an Improper Authentication issue","modified":"2026-10-01T17:45:15.987564015Z","packages":[{"ecosystem":"PyPI","name":"social-auth-core","purl":"pkg:pypi/social-auth-core","ranges":["<5.0.0"],"fixed":["5.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}