CVE-2026-67855

Severity CVSS v4.0:

Pending analysis

Type:

CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

Publication date:

04/08/2026

Last modified:

05/08/2026

Description

open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/open62541/open62541
https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c
https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c
https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h
https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c
https://github.com/open62541/open62541/issues/8093
https://github.com/open62541/open62541/issues/8093