CVE WatchSep 24, 2026

CVE-2026-57175

Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the SAML backend accepted SAML responses on th

CVSS

6.4

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 24, 2026 · Last modified: Sep 24, 2026 · CWE-287

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

github.comhttps://github.com/python-social-auth/social-core/security/advisories/GHSA-vq6g-g6c7-5f2j

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