Bug 2540587 (CVE-2026-57175) - CVE-2026-57175 social-auth-core: social-auth-core: Account takeover via unverified SAML responses
Summary: CVE-2026-57175 social-auth-core: social-auth-core: Account takeover via unver...
Keywords:
Status: NEW
Alias: CVE-2026-57175
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-24 17:28 UTC by OSIDB Bzimport
Modified: 2026-09-29 08:05 UTC (History)
12 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-24 17:28:21 UTC
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.


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