Description

Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata

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CVSS v3.1 Score

7.5

HIGH

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

References

Other References

https://github.com/open62541/open62541/blob/v1.5.5/examples/tutorial_server_alarms_conditions.c https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_method.c https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription_alarms_conditions.c https://github.com/open62541/open62541/issues/8171

Frequently Asked Questions

What is CVE-2026-67869? +

Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-67869? +

CVE-2026-67869 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-67869? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.