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CVE-2026-57176: CWE-289: Authentication Bypass by Alternate Name in python-social-auth social-core

0
Medium
VulnerabilityCVE-2026-57176cvecve-2026-57176cwe-289
Published: 09/24/2026 (09/24/2026, 17:22:54 UTC)
Source: CVE Database V5
Vendor/Project: python-social-auth
Product: social-core

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.

CVSS v3.1

Score 6.8medium

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected software

python-social-auth

social-core

Affected versions
<5.0.0

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-06-24T01:47:55.286Z
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6ab55f10f7a7c541069deb4e

Added to database: 09/24/2026, 17:34:08 UTC

Last updated: 09/24/2026, 17:34:08 UTC

Views: 1

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