CVE-2026-80515 Auth bypass in Eclipse Arrowhead
Authenticated users can bypass management authorization checks via URL encoding to create admin accounts and take over the cloud.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-80515?
CVE-2026-80515 is a high-severity authentication bypass vulnerability in Eclipse Arrowhead, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 the management-authorization gate that protects every /…/mgmt/… REST endpoint decides whether to apply its check by calling request.getRequestURL().toString().contains("/mgmt/"). Tomcat returns getRequestURL() un-decoded, while Spring MVC's DispatcherServlet routes on the decoded path. Requesting /serviceregistry/%6Dgmt/systems (%6D == m) therefore fails the substring check — the filter falls through without authorising — yet is decoded to /serviceregistry/mgmt/systems and dispatched to the management controller. Spring Security's StrictHttpFirewall (active via spring-boot-starter-security in arrowhead-common) only rejects encoded / \ . % ; and null bytes, so percent-encoded ASCII letters pass through. Any authenticated system — regardless of privilege — can reach every management operation, including POST /authentication/mgmt/identities which creates new sysop accounts, yielding full administrative takeover of the local cloud.
Which versions are affected by CVE-2026-80515?
How do I fix CVE-2026-80515?
No fix has been published for CVE-2026-80515 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-80515 being exploited?
There is no known exploitation of CVE-2026-80515 in the wild and no public exploit code.
Sources
Also known as GHSA-3hpw-g5v5-5p77.