CVE-2026-61638: Ellite Wallos

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints/notifications/testemailnotifications.php accepts smtpaddress and smtpport from POST body with zero SSRF validation. PHPMailer connects to attacker-supplied host:port. Every other notification endpoint uses ssrf_helper.php but email was missed. Any authenticated user can probe internal network, cloud metadata. This issue has been patched in version 4.9.6.

Affected products

• Ellite Wallos: before 4.9.6 (fixed in 4.9.6)

Published 2026-08-31. Last modified 2026-09-08.