CVE-2026-67857

high

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

https://github.com/open62541/open62541/issues/8104

https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_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/examples/client_connect.c

https://github.com/gff-cw/information/issues/9

Details

Source: Mitre, NVD

Published: 2026-08-04

Updated: 2026-08-04

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High