CVE-2026-67863 Affecting open62541 package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Aug 2026
- disclosed5 Aug 2026
Introduced: 5 Aug 2026
NewCVE-2026-67863 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest open62541.
NVD Description
Note: Versions mentioned in the description apply only to the upstream open62541 package and not the open62541 package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2026-67863
- 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_services_monitoreditem.c
- https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c
- https://github.com/open62541/open62541/issues/8131