CVE-2026-67863In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Deferred
- Record last updated
- Aug 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
No affected products are listed yet.
References
- https://github.com/open62541/open62541/issues/8131
- https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h
- https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c
- https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.