What is CVE-2026-67870?

CVE-2026-67870 is a critical-severity vulnerability in N/a, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2026-08-06.

How severe is CVE-2026-67870?

Critical severity. CVSS v3 base score is 9.8 out of 10.

NULL pointer dereference in N/a

CVE-2026-67870

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.

EPSS: 0.006 (45.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-67870?: CVE-2026-67870 is a critical-severity vulnerability in N/a, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2026-08-06.
How severe is CVE-2026-67870?: Critical severity. CVSS v3 base score is 9.8 out of 10.