CVE-2026-57177

Name	CVE-2026-57177
Description	Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, 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. The issue has been fixe in version 5.0.0 by enabling callback state validation for the LoginRadius backend.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
social-auth-core (PTS)	bookworm	4.3.0-1	vulnerable
	trixie	4.6.1-1	vulnerable
	forky, sid	5.1.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
social-auth-core	source	(unstable)	5.0.2-1

Notes

https://github.com/python-social-auth/social-core/security/advisories/GHSA-x7qq-23vw-7pfg
https://github.com/python-social-auth/social-core/pull/1808
Fixed by: https://github.com/python-social-auth/social-core/commit/4d332820e6b0583fde522956105a0e2beced5335 (5.0.0)