CVE-2026-67869 Memory corruption in n/a
A remote attacker can cause a denial of service in the open62541 OPC UA library via a buffer overflow in Service_Call input validation.
- 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-2026-67869?
CVE-2026-67869 is a high-severity memory corruption vulnerability in n/a, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata
Weakness: CWE-120
Which versions are affected by CVE-2026-67869?
How do I fix CVE-2026-67869?
No fix has been published for CVE-2026-67869 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-67869 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67869 exists.
Sources
Also known as DEBIAN-CVE-2026-67869, GHSA-86h5-5qfw-5vr9, UBUNTU-CVE-2026-67869.