Python Social Auth: Login CSRF in LINE backend (LineOAuth2) — missing OAuth state validation (incomplete fix of 5.0.0 campaign)

Impact Applications using the LINE Login backend are vulnerable to login CSRF / forced authentication. An attacker can start a LINE authorization flow for an account they control and trick a victim into visiting the callback URL with the attacker’s authorization code. Because the LINE backend did...

CVE-2026-62322

The Python Social Auth library is vulnerable to a Login CSRF attack in the LINE backend (LineOAuth2) prior to version 5.0.2 . The root cause is a failure to validate the returned OAuth state during the authorization code exchange. An attacker can initiate authorization for a controlled LINE accou...