CVE-2026-67863

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-67863
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 23:16:53 UTC
Updated2026-08-05 23:16:53 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
github.com/open62541/open62541/issues/8131 [email protected] github.com
github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c [email protected] github.com
github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h [email protected] github.com
github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monito... [email protected] github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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