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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Open62541
  • Open62541

No data.

No data.

References
Link Providers
https://github.com/open62541/open62541 cve-icon cve-icon
https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c cve-icon cve-icon
https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c cve-icon cve-icon
https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h cve-icon cve-icon
https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c cve-icon cve-icon
https://github.com/open62541/open62541/issues/8093 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-67855 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-67855 cve-icon
History

Wed, 05 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 05 Aug 2026 14:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 05 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
Title Heap Use-After-Free in open62541 GDS PushManagement Allows Remote Denial of Service open62541: open62541: Denial of Service via heap use-after-free
Weaknesses CWE-825
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important

Wed, 05 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Open62541
Open62541 open62541
Vendors & Products Open62541
Open62541 open62541

Tue, 04 Aug 2026 22:45:00 +0000

Type Values Removed Values Added
Title Heap Use-After-Free in open62541 GDS PushManagement Allows Remote Denial of Service
Weaknesses CWE-416

Tue, 04 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
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.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-08-04T00:00:00.000Z

Updated: 2026-08-05T18:54:07.071Z

Reserved: 2026-07-30T00:00:00.000Z

Link: CVE-2026-67855

cve-icon Vulnrichment

Updated: 2026-08-05T18:53:20.398Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-04T00:00:00Z

Links: CVE-2026-67855 - Bugzilla