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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00228.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vq6g-g6c7-5f2j social-auth-core has an Improper Authentication issue
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/python-social-auth/social-core/security/advisories/GHSA-vq6g-g6c7-5f2j cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-57175 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-57175 cve-icon
History

Fri, 25 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-303
References
Metrics threat_severity

None

 threat_severity

Moderate

Thu, 24 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Title social-auth-core has an Improper Authentication issue
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-24T17:11:49.925Z

Reserved: 2026-06-24T01:47:55.286Z

Link: CVE-2026-57175

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-24T18:17:14.523

Modified: 2026-09-25T13:27:31.790

Link: CVE-2026-57175

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-24T17:11:49Z

Links: CVE-2026-57175 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-25T05:15:17Z

Weaknesses