CVE-2026-67862 Denial of service in n/a
A buffer overflow in open62541 allows remote attackers to cause a denial of service via high-level attribute reading logic.
- 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-2026-67862?
CVE-2026-67862 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
open62541 1.5.5 contains a buffer-overflow in the high-level attribute reading logic in src/client/ua_client_highlevel.c. This allows a remote attacker to cause a denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2026-67862?
How do I fix CVE-2026-67862?
No fix has been published for CVE-2026-67862 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-2026-67862 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67862 exists.
Sources
Also known as DEBIAN-CVE-2026-67862, GHSA-vqxw-7v8h-rvf2, UBUNTU-CVE-2026-67862.