Use After Free in N/a
CVE-2026-67863
In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_localPublish continues to use the current UA_Notification after a callback invokes UA_Server_deleteMonitoredItem for the current local MonitoredItem. This allows a remote attacker to cause a denial of service.
Vulnerability class: Use-After-Free
EPSS: 0.004 (34.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- N/a — versions n/a
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-67863?
- CVE-2026-67863 is a high-severity vulnerability in N/a, classified under Use After Free. CVSS score: 7.5/10. Published 2026-08-05.
- How severe is CVE-2026-67863?
- High severity. CVSS v3 base score is 7.5 out of 10.