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Vulnerability record · CVE-2026-67857 · published 4 August 2026

CVE-2026-67857: Out-of-bounds read vulnerability

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

7.5 CVSS 3.1 High EPSS 0.63% · top 51.9% CWE-125 · Out-of-bounds read Deferred
7.5CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
31 Aug 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/gff-cw/information/issues/9
https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c
https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c
https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c
https://github.com/open62541/open62541/issues/8104
https://github.com/open62541/open62541/issues/8104

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Source: NIST National Vulnerability Database (record CVE-2026-67857), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.