CVE-2026-67863: n/a
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.
AI Analysis
Technical Summary
CVE-2026-67863 describes a server-side use-after-free vulnerability in open62541 version 1.5.5. The issue arises in the local MonitoredItem callback path when UA_Subscription_localPublish continues to reference a UA_Notification after a callback triggers UA_Server_deleteMonitoredItem on the current local MonitoredItem. This improper memory handling can cause a denial of service by crashing the server or destabilizing its operation. The vulnerability is remotely exploitable without authentication or user interaction.
Potential Impact
A remote attacker can exploit this vulnerability to cause a denial of service on the affected open62541 server by triggering a use-after-free condition in the local MonitoredItem callback path. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor vendor communications for updates and apply patches once available.
CVE-2026-67863: n/a
Description
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 v3.1
Score 7.5high
Affected software
pkg:github/open62541/open62541Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-67863 describes a server-side use-after-free vulnerability in open62541 version 1.5.5. The issue arises in the local MonitoredItem callback path when UA_Subscription_localPublish continues to reference a UA_Notification after a callback triggers UA_Server_deleteMonitoredItem on the current local MonitoredItem. This improper memory handling can cause a denial of service by crashing the server or destabilizing its operation. The vulnerability is remotely exploitable without authentication or user interaction.
Potential Impact
A remote attacker can exploit this vulnerability to cause a denial of service on the affected open62541 server by triggering a use-after-free condition in the local MonitoredItem callback path. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor vendor communications for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-07-30T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a73bc29bf8831d53990b445
Added to database: 08/05/2026, 22:41:45 UTC
Last enriched: 08/13/2026, 16:52:56 UTC
Last updated: 09/18/2026, 00:07:02 UTC
Views: 65
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