CVE-2026-67863: n/a
A use-after-free vulnerability exists in open62541 version 1.5.5 within the server-side local MonitoredItem callback path. This flaw occurs when the UA_Subscription_localPublish function continues to use a UA_Notification after a callback deletes the current local MonitoredItem, potentially leading to a denial of service caused by remote attackers.
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 referencing a UA_Notification after a callback invokes UA_Server_deleteMonitoredItem on the current local MonitoredItem. This improper memory handling can be exploited remotely to cause a denial of service condition.
Potential Impact
The vulnerability allows a remote attacker to cause a denial of service by triggering a use-after-free condition in the server process. There is no indication of confidentiality or integrity impact, and no privileges or user interaction are required for exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented.
CVE-2026-67863: n/a
Description
A use-after-free vulnerability exists in open62541 version 1.5.5 within the server-side local MonitoredItem callback path. This flaw occurs when the UA_Subscription_localPublish function continues to use a UA_Notification after a callback deletes the current local MonitoredItem, potentially leading to a denial of service caused by remote attackers.
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.
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 referencing a UA_Notification after a callback invokes UA_Server_deleteMonitoredItem on the current local MonitoredItem. This improper memory handling can be exploited remotely to cause a denial of service condition.
Potential Impact
The vulnerability allows a remote attacker to cause a denial of service by triggering a use-after-free condition in the server process. There is no indication of confidentiality or integrity impact, and no privileges or user interaction are required for exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-07-30T00:00:00.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a73bc29bf8831d53990b445
Added to database: 08/05/2026, 22:41:45 UTC
Last enriched: 08/05/2026, 22:56:04 UTC
Last updated: 08/05/2026, 23:01:06 UTC
Views: 3
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