Description

open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.

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References

Other References

https://github.com/open62541/open62541 https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c https://github.com/open62541/open62541/issues/8093

Frequently Asked Questions

What is CVE-2026-67855? +

open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.

How do I check if I'm vulnerable to CVE-2026-67855? +

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.