CVE-2026-62322 Python Social Auth: Login CSRF in LINE backend (LineOAuth2) — missing OAuth state validation (incomplete fix of 5.0.0 campaign)
Attackers can force victims into attacker-controlled accounts or link attacker identities to victim accounts via missing OAuth state validation in the LINE backend.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-62322?
CVE-2026-62322 is a medium-severity vulnerability in python-social-auth social-core, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Python Social Auth is a social authentication/registration mechanism. Prior to 5.0.2, the LINE backend exchanges an authorization code without validating the returned OAuth state. An attacker can begin authorization for an attacker-controlled LINE account and induce a victim to visit the resulting callback URL, causing the application to log the victim into the attacker's account. When account linking is enabled, the same missing validation can link the attacker's LINE identity to the victim's existing account and create a persistent unauthorized login path. Only applications with the LINE backend enabled are affected. This issue is fixed in version 5.0.2.
Weakness: CWE-352
Which versions are affected by CVE-2026-62322?
2 open source packages ship an affected version, including social-auth-core.
| Package | Affected | Fixed in |
|---|---|---|
social-auth-core PyPI | All versions | 5.0.2 |
social-auth-core PyPI | All versions | 5.0.2 |
How do I fix CVE-2026-62322?
Upgrade social-auth-core to 5.0.2 or later.
Is CVE-2026-62322 being exploited?
There is no known exploitation of CVE-2026-62322 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-62322, GHSA-526j-582w-7fm9, UBUNTU-CVE-2026-62322.