HIGH 7.5 NVD
CVE-2026-67858
Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backen
Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backend. An unauthenticated remote attacker can send a RegisterServer or RegisterServer2 request containing many unique discoveryUrls. This allows remote attackers to cause a denial of service.
References
- https://github.com/open62541/open62541/blob/master/doc/building.rst
- https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.c
- https://github.com/open62541/open62541/issues/8094
- https://github.com/open62541/open62541/tree/master/examples/discovery
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-04 via NVD.
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