Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck
CVE-2026-86777AlchemyCMS before 7.4.16 and 8.x before 8.3.6 Missing Authorization on GET /api/nodes
Medium 5.3
In plain English
A medium-severity missing authorization in alchemy_cms from AlchemyCMS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.6%top 53.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AlchemyCMS | alchemy_cms | 0 – before 7.4.168.0.0 – before 8.3.6 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-wppq-8h64-w78r) vendor-advisory
- Fix commit (8.3.6) patch
- Fix commit (7.4.16) patch
- Vulnerable Api::NodesController#index at v8.3.5 technical-description
- alchemy_cms v8.3.6 Release Notes release-notes
- alchemy_cms v7.4.16 Release Notes release-notes
- https://github.com/AlchemyCMS/alchemy_cms product
- VulnCheck Advisory: AlchemyCMS before 7.4.16 and 8.x before 8.3.6 Missing Authorization on GET /api/nodes third-party-advisory