EUVD-2026-86312

Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the vk-app backend accepted VK application callback data without verifying the callback signature when the authkey parameter was omitted. Applications using this backend could treat unsigned...

CVE-2026-57178

The Python Social Auth library, specifically the vk-app backend , is vulnerable to an authentication bypass in versions prior to 5.0.0 . The root cause is that the backend accepts VK application callback data without verifying the signature when the auth_key parameter is missing. This allows an a...