CVE-2026-61641 Wallos: OIDC account takeover via email-based account linking without `email_verified` check
Attackers can take over admin accounts in Wallos by exploiting OIDC email linking flaws when using IdPs that allow unverified email claims.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61641?
CVE-2026-61641 is a high-severity authentication bypass vulnerability in ellite Wallos, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Wallos is an open-source, self-hostable personal subscription tracker. From version 4.0.0 to before version 4.9.6, Wallos's OIDC login links an incoming OIDC identity to an existing local account by matching the email claim alone, without verifying that the IdP marked that email as verified (email_verified). When Wallos is configured against an IdP that lets a user present an arbitrary or unverified email (multi-tenant IdPs, IdPs with open self-registration, or any IdP the attacker partly controls), an attacker with no Wallos account can authenticate with the admin's email and be logged in as the admin — full account takeover, no password needed. This issue has been patched in version 4.9.6.
Weakness: CWE-287
Which versions are affected by CVE-2026-61641?
How do I fix CVE-2026-61641?
No fix has been published for CVE-2026-61641 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-61641 being exploited?
There is no known exploitation of CVE-2026-61641 in the wild and no public exploit code.
Sources
Also known as GHSA-qwgp-m2f3-6j3r.