open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.

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.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

No data.

No data.

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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/gff-cw/information/issues/9 cve-icon
https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c cve-icon
https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c cve-icon
https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c cve-icon
https://github.com/open62541/open62541/issues/8104 cve-icon
History

Tue, 04 Aug 2026 23:15:00 +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 Out-of-Bounds Read in open62541 Client Namespace Processing
Weaknesses CWE-788

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

Type Values Removed Values Added
Description open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.
References
Metrics cvssV3_1

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-04T21:21:25.605Z

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

Link: CVE-2026-67857

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T23:00:14Z

Weaknesses