Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the Vend OAuth2 backend used only the numeric Vend user_id as the social-auth UID. When multiple Vend shops authenticate through the same application, users from different shops with the same internal Vend user ID could collide in the social-auth association table. A user from one shop could then be authenticated as the local account previously associated with the same numeric user ID from another shop. The issue affects applications using the Vend OAuth2 backend with more than one Vend shop. Version 5.0.0 patches the issue.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-fp7w-m676-w7gc social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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

Type Values Removed Values Added
Weaknesses CWE-694
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 Vend OAuth2 backend used only the numeric Vend user_id as the social-auth UID. When multiple Vend shops authenticate through the same application, users from different shops with the same internal Vend user ID could collide in the social-auth association table. A user from one shop could then be authenticated as the local account previously associated with the same numeric user ID from another shop. The issue affects applications using the Vend OAuth2 backend with more than one Vend shop. Version 5.0.0 patches the issue.
Title social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend
Weaknesses CWE-289
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-24T17:22:54.850Z

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

Link: CVE-2026-57176

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-24T18:17:14.680

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

Link: CVE-2026-57176

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-24T17:22:54Z

Links: CVE-2026-57176 - Bugzilla

cve-icon OpenCVE Enrichment

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

Weaknesses