CVE-2026-33407: Wallosapp Wallos

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server performs DNS resolution on user-supplied search terms, which can be controlled by attackers to trigger outbound requests to arbitrary domains. This issue has been patched in version 4.7.0.

Affected products

• Wallosapp Wallos: before 4.7.0 (fixed in 4.7.0)

Published 2026-03-24. Last modified 2026-06-17.