CVE-2026-67863CWE-416

CVE-2026-67863

High · published August 6, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
54.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00737 · 54.0th percentile
Weakness
CWE-416 · Use After Free
Published
2026-08-06T03:16Z
References (5)
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h · [email protected]https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c · [email protected]https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c · [email protected]https://github.com/open62541/open62541/issues/8131 · [email protected]https://github.com/open62541/open62541/issues/8131 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 05 AUG 00:00Z
    In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path
    cvelistv5