CVE-2026-61641: Wallos OIDC account takeover via unverified email linking

CVE-2026-61641 · Severity: high · CVSS 8.1 · Published 2026-08-31

Wallos is an open-source subscription tracker that supports single sign-on via OIDC identity providers. Due to insufficient email verification during account linking, an attacker can register with an admin's email address at a multi-tenant or self-registration-enabled identity provider, then authenticate to Wallos as the admin without knowing the password. This results in complete account takeover with administrative privileges.

Technologies: Ellite Wallos. Vendors: Ellite.

Quick answers

Is CVE-2026-61641 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-61641 being exploited in the wild.
How severe is CVE-2026-61641?
High severity, with a CVSS score of 8.1, published 31 August 2026.
Which products and versions are affected?
Ellite Wallos 4.0.0 to 4.9.5.
Is there a fix for CVE-2026-61641?
A patch was published on 2026-06-22: Version 4.9.6 released with fix for email_verified verification Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-61641 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-61641?
Check whether you run Ellite Wallos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authentication bypass in OIDC account linking logic. When a user authenticates via OIDC, Wallos matches the incoming email claim to an existing local account without verifying the IdP's email_verified flag. An attacker controlling or gaining access to an IdP that permits unverified or arbitrary email claims (such as a multi-tenant IdP, open self-registration, or a compromised IdP) can present the admin's email address during authentication and be granted access as that admin. The vulnerability affects versions 4.0.0 through 4.9.5; patching requires verifying the email_verified claim from the IdP before linking accounts. No authentication or special user interaction is required beyond redirecting to the vulnerable OIDC flow.

Affected products

  • ellite Wallos 4.0.0 to 4.9.5

Timeline

  • 2026-08-31: disclosed: CVE-2026-61641 published
  • 2026-06-22: patched: Version 4.9.6 released with fix for email_verified verification

References

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