CVE-2026-41689: Ellite Wallos

Medium severity, CVSS 6.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the webhook notification feature reuses an administrator-configured local-target allowlist for every logged-in user. Any normal user can fully control a webhook URL, headers, and body, then use Wallos to send server-side requests to allowlisted internal automation services. When such a target exposes deployment or execution APIs, this can further enable adjacent-service RCE, but that downstream result is conditional on the target service. At time of publication, there are no publicly available patches.

Affected products

• Ellite Wallos: up to and including 4.8.4

Published 2026-05-07. Last modified 2026-06-17.