social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| python-social-auth | social-core | before 5.0.0 | 5.0.0 | Patch available | CNA |
| — | social-auth-core (PyPI) | before 5.0.0 | 5.0.0 | Patch available | GHSA-fp7w-m676-w7gc |
- social-core Vendorpython-social-auth Affected before 5.0.0 Fixed in 5.0.0 Patch available CNA
- social-auth-core (PyPI) Vendor— Affected before 5.0.0 Fixed in 5.0.0 Patch available GHSA-fp7w-m676-w7gc
Remediation
- Fix · CNA social-core (python-social-auth) Fixed in 5.0.0
- Fix · GHSA-fp7w-m676-w7gc social-auth-core (PyPI) Fixed in 5.0.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57176
- 2026-10-03 Alias added: GHSA-fp7w-m676-w7gc
References
Other 5
- https://github.com/python-social-auth/social-core/security/advisories/GHSA-fp7w-m676-w7gc
- https://github.com/python-social-auth/social-core/pull/1795
- https://github.com/python-social-auth/social-core/commit/dee7ad1785877afd355dd6860598823d2631b76e
- https://github.com/python-social-auth/social-core
- https://github.com/python-social-auth/social-core/releases/tag/5.0.0
More python-social-auth vulnerabilities
- TI-2026-80499 OpenID Connect nonce not bound to session in Python Social Auth CVSS 3.1MEDIUM 6.8
- TI-2025-38176 Python Social Auth - Django has unsafe account association CVSS 4.0MEDIUM 6.3
- TI-2026-41144 social-auth-core: VK App backend accepts unsigned callback data when auth_key is missing CVSS 3.1HIGH 7.4
- TI-2026-41141 social-auth-core has an Improper Authentication issue CVSS 3.1MEDIUM 6.4
- TI-2026-74654 Login CSRF in Python Social Auth LINE backend CVSS 3.1MEDIUM 6.5
- TI-2024-21751 social-auth-app-django Improper Handling of Case Sensitivity vulnerability CVSS 3.1MEDIUM 4.9
Sources
- CVE-2026-57176 · CVE Program
- CVE-2026-57176 · NVD
- FIRST EPSS
- GHSA-fp7w-m676-w7gc · GitHub Advisory Database · CC BY 4.0
- CVE-2026-57176 · Red Hat security data · CC BY 4.0
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