social-auth-core has an Improper Authentication issue
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Security bypass
- 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. Impact type from CWE-287.
Summary
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.
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-vq6g-g6c7-5f2j |
- 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-vq6g-g6c7-5f2j
Remediation
- Fix · CNA social-core (python-social-auth) Fixed in 5.0.0
- Fix · GHSA-vq6g-g6c7-5f2j 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-2026-57175
- 2026-10-03 Alias added: GHSA-vq6g-g6c7-5f2j
- 2026-10-05 CISA SSVC decision points changed
References
Other 5
- https://github.com/python-social-auth/social-core/security/advisories/GHSA-vq6g-g6c7-5f2j
- https://github.com/python-social-auth/social-core/pull/1794
- https://github.com/python-social-auth/social-core/commit/5c72f71125bc60e4411f09e2a9f998de5da7fcb6
- 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-2026-41142 social-auth-core Vulnerable to Account Takeover via Identity Binding Flaw in Vend Backend CVSS 3.1MEDIUM 6.8
- 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-2026-57175 · CVE Program
- CVE-2026-57175 · NVD
- FIRST EPSS
- GHSA-vq6g-g6c7-5f2j · GitHub Advisory Database · CC BY 4.0
- CVE-2026-57175 · Red Hat security data · CC BY 4.0
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