CVE-2026-30840 Wallos: Server-Side Request Forgery (SSRF) in Notification Testers

High 8.8 Published 7 Mar 2026 Updated 9 Mar 2026

An attacker can exploit a Server-Side Request Forgery vulnerability in Wallos notification testers to access internal resources or bypass security controls.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-30840?

CVE-2026-30840 is a high-severity server-side request forgery vulnerability in ellite Wallos, published on 7 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, there is a server-side request forgery vulnerability in notification testers. This issue has been patched in version 4.6.2.

Weakness: CWE-918, CWE-295

Which versions are affected by CVE-2026-30840?

It affects 1 product.

Products include Wallosapp Wallos.

How do I fix CVE-2026-30840?

No fix has been published for CVE-2026-30840 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-30840 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30840 exists.

Sources

Also known as GHSA-mr2c-prqv-hqm8.