CVE-2026-86777: Alchemycms Alchemy CMS

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

AlchemyCMS versions before 7.4.16 and 8.x before 8.3.6 fail to authorize access to the GET /api/nodes endpoint, allowing unauthenticated attackers to retrieve all navigation nodes. Attackers can access the endpoint without authentication to disclose restricted page names, URL paths, and internal URLs from all sites and languages.

Affected products

• Alchemycms Alchemy CMS: before 7.4.16 (fixed in 7.4.16); from 8.0.0, before 8.3.6 (fixed in 8.3.6)

Published 2026-09-09. Last modified 2026-09-10.