CVE-2026-15704 CWE-863: ABAC authorization bypass via trailing slash route normalization in Eclipse BaSyx Go Components
Attackers can bypass ABAC authorization by appending trailing slashes to protected API routes, allowing unauthorized access to data and operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15704?
CVE-2026-15704 is a critical missing authorization vulnerability in Eclipse BaSyx Go Components, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Eclipse BaSyx Go Components versions up to and including 1.0.0, ABAC-enabled deployments are vulnerable to an authorization bypass caused by inconsistent trailing-slash handling between the ABAC middleware and the HTTP router.
The shared router configuration used Chi's `middleware.StripSlashes`, so a request such as `GET /shells/` was dispatched to the registered `GET /shells` route. However, the ABAC middleware evaluated the original request path including the trailing slash. If ABAC route lookup did not find a matching slash-suffixed route, the request was passed onward and the router then stripped the slash and executed the protected handler without the intended ABAC authorization decision and without the expected ABAC query filters.
An unauthenticated or unauthorized network attacker could append a trailing slash to protected API routes to reach handlers that should have been denied by ABAC policy. Depending on the exposed component, HTTP method, and deployed policy, this could allow unauthorized read, create, update, delete, or upload operations.
The issue affects ABAC-enabled deployments of services that use the shared router and ABAC middleware, including AAS Repository, Submodel Repository, AAS Registry, Submodel Registry, Concept Description Repository, Discovery, AAS Environment upload, and related services. The issue is fixed in Eclipse BaSyx Go Components v1.0.1.
Which versions are affected by CVE-2026-15704?
How do I fix CVE-2026-15704?
No fix has been published for CVE-2026-15704 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-15704 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15704 exists.
Sources
Also known as GHSA-86p5-cmgc-c94w.