CVE-2026-67310 openremote before 1.27.0 Cross-Tenant IDOR via setAssetLinks
An authenticated attacker can bypass realm checks to link assets across tenants, disclosing victim asset names and modifying links.
- 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-2026-67310?
CVE-2026-67310 is a medium-severity missing authorization vulnerability in openremote, published on 1 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenRemote (org.openremote:openremote) versions <= 1.26.2 contain an insecure direct object reference vulnerability in the setAssetLinks endpoint of AlarmResourceImpl. The realm access check validates only a single realm obtained via realms.stream().findFirst() on a HashSet of realms from the request, rather than all realms. Because HashSet iteration order is non-deterministic, an authenticated attacker who includes alarm-asset links from both their own realm and a victim realm can, with roughly 50% probability per request (retryable), persist cross-tenant links and disclose victim asset names (returned via @Formula fields) through GET requests on the attacker's own alarm. Fixed in 1.27.0.
Weakness: CWE-863
Which versions are affected by CVE-2026-67310?
How do I fix CVE-2026-67310?
No fix has been published for CVE-2026-67310 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-2026-67310 being exploited?
There is no known exploitation of CVE-2026-67310 in the wild and no public exploit code.
Sources
Also known as GHSA-4f8w-fmh5-hcxr, GHSA-q2gm-frx3-2qjr.