Improper Validation of Integrity Check Value Affecting social-auth-core package, versions [,5.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-SOCIALAUTHCORE-20158376
- published27 Sept 2026
- disclosed24 Sept 2026
- creditUnknown
Introduced: 24 Sep 2026
NewCVE-2026-57175 (opens in a new tab)How to fix?
Upgrade social-auth-core to version 5.0.0 or higher.
Overview
social-auth-core is a package that makes Python social authentication simple.
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value via the SAML authentication backend (social_core/backends/saml.py), which fails to validate SAML responses against the originating AuthnRequest ID. An attacker can forge or replay a SAML response with a mismatched or absent InResponseTo field, bypassing the binding between the identity provider's response and the original authentication request, which can lead to account takeover or unauthorized account association.