social-auth-core has a Session Fixation issue

ImpactThe partial-pipeline resume mechanism accepted partialtoken as a bearer credential without binding it to the browser session that created it.Applications using resumable partial pipeline steps could allow an attacker to start an authentication flow, obtain a valid partial token and...

Session Fixation

Overview social-auth-core is a package that makes Python social authentication simple. Affected versions of this package are vulnerable to Session Fixation via the partial pipeline resume mechanism in socialcore/utils.py and socialcore/actions.py. An attacker can resume another user's partial...

CVE-2026-57179

A flaw was found in social-auth-core. The partial-pipeline resume mechanism processes partial authentication tokens without binding them to the originating browser session. A remote attacker can exploit this vulnerability by initiating an authentication flow to obtain a token and inducing a victi...

EUVD-2026-86319

Python Social Auth is a social authentication/registration mechanism. Prior to version 5.0.0, the partial-pipeline resume mechanism accepted partialtoken as a bearer credential without binding it to the browser session that created it. Applications using resumable partial pipeline steps could all...

PT-2026-98191

Name of the Vulnerable Software and Affected Versions Python Social Auth versions prior to 5.0.0 Description The partial-pipeline resume mechanism accepts the partial token as a bearer credential without binding it to the browser session that created it. This allows an attacker to initiate an...