CVE-2026-63035 o6 Automation open62541 Use After Free
An authenticated attacker can exploit a use-after-free flaw in open62541 to execute arbitrary code or cause denial of service.
- 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-2026-63035?
CVE-2026-63035 is a high-severity use after free vulnerability in o6 Automation open62541, published on 30 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.
Weakness: CWE-416
Which versions are affected by CVE-2026-63035?
How do I fix CVE-2026-63035?
No fix has been published for CVE-2026-63035 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-63035 being exploited?
There is no known exploitation of CVE-2026-63035 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-63035, GHSA-w956-qq95-g5q3, UBUNTU-CVE-2026-63035.