CVE-2026-67870CWE-476

CVE-2026-67870

Critical · published August 6, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
64.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01063 · 64.4th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-08-06T04:16Z
References (5)
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h · [email protected]https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.c · [email protected]https://github.com/open62541/open62541/blob/v1.5.5/src/ua_types.c · [email protected]https://github.com/open62541/open62541/issues/8172 · [email protected]https://github.com/open62541/open62541/issues/8172 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 05 AUG 00:00Z
    In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets
    cvelistv5