social-auth-core has Login CSRF via Missing State Parameter in LoginRadius Backend
Impact
The LoginRadius backend did not validate OAuth state during the authentication flow.
Applications using this backend were vulnerable to login CSRF. An attacker could cause a victim's browser session to complete authentication using an attacker-controlled LoginRadius token, making the victim authenticated as the attacker's LoginRadius identity.
The issue affects only applications using the LoginRadius backend.
Patches
The issue has been fixed by enabling callback state validation for the LoginRadius backend.
Users should upgrade to a patched version.
Fix:
Workarounds
Applications that cannot upgrade immediately should disable the LoginRadius backend by removing it from SOCIAL_AUTH_AUTHENTICATION_BACKENDS.
There is no complete workaround while continuing to use the vulnerable backend.
Credits
Reported through GitHub private vulnerability reporting by Liyi Zhou, Ziyue Wang, Strick, Maurice, and Chenchen Yu from the University of Sydney security research team.
Reporter references:
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | social-auth-core | < 5.0.0 | 5.0.0 |
References
- https://github.com/python-social-auth/social-core/security/advisories/GHSA-x7qq-23vw-7pfg
- https://nvd.nist.gov/vuln/detail/CVE-2026-57177
- https://github.com/python-social-auth/social-core/pull/1808
- https://github.com/python-social-auth/social-core/commit/4d332820e6b0583fde522956105a0e2beced5335
- https://github.com/python-social-auth/social-core
- https://github.com/python-social-auth/social-core/releases/tag/5.0.0
- https://pypi.org/project/social-auth-core
- https://github.com/advisories/GHSA-x7qq-23vw-7pfg
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-352- Platform
- Python (PyPI)
- Package
social-auth-core- Disclosed
- 24.09.2026
- Updated
- 11.10.2026 15:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-4169 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-x7qq-23vw-7pfg - CC BY 4.0
Vulnerability history: social-auth-core
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 09.2026 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 4
Disclosures per year
- 2026: 5
-
social-auth-core has Login CSRF via Missing State Parameter in LoginRadius Backend this entry
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