CVE-2026-18784

A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

CVSS 4.0

1.9CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-122

Published

2026-08-04

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

References

• https://github.com/gff-cw/information/issues/11
• https://github.com/open62541/open62541/issues/8139
• https://vuldb.com/cve/CVE-2026-18784
• https://vuldb.com/submit/857012
• https://vuldb.com/vuln/385786

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