CVE-2026-61640: Ellite Wallos

High severity, CVSS 8.5. 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, Admin-configured OIDC token_url and user_info_url in includes/oidc/handle_oidc_callback.php:18-49 are used directly in curl_init() with zero SSRF filtering. Unlike logo/webhook URLs which have validate_webhook_url_for_ssrf(), OIDC URLs bypass all protections. Admin sets URL to http://169.254.169.254/latest/meta-data/ for cloud metadata access or internal network pivoting. 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.