CVE-2026-67861 Denial of service in n/a
A remote attacker can cause a denial of service in the open62541 OPC UA library via the UA_Client_getRemoteDataTypes component.
- 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-2026-67861?
CVE-2026-67861 is a high-severity denial of service vulnerability in n/a, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via the UA_Client_getRemoteDataTypes component
Weakness: CWE-400
Which versions are affected by CVE-2026-67861?
How do I fix CVE-2026-67861?
No fix has been published for CVE-2026-67861 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-67861 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67861 exists.
Sources
Also known as DEBIAN-CVE-2026-67861, GHSA-5hm6-mc9f-6w2p, UBUNTU-CVE-2026-67861.