What’s Vulnerable › Vulnerabilities

CVE-2026-67855

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-04 · updated 2026-08-31
• Weakness: CWE-400

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.

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
• https://github.com/open62541/open62541/issues/8093

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