Bug 2511857 (CVE-2026-67870) - CVE-2026-67870 open62541: open62541: Denial of Service via incomplete validation in AddReferences
Summary: CVE-2026-67870 open62541: open62541: Denial of Service via incomplete validat...
Keywords:
Status: NEW
Alias: CVE-2026-67870
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2511891
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-05 23:21 UTC by OSIDB Bzimport
Modified: 2026-08-06 04:19 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-08-05 23:21:26 UTC 
In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node pointer to remain NULL while execution continues.
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