CVE-2026-11946

A flaw was found in open62541. An unauthenticated remote attacker can exploit a vulnerability in the GetEndpoints Discovery Service by sending a malformed request with an excessively long, unvalidated endpointUrl field. This can lead to the server buffering large amounts of data indefinitely,...

UBUNTU-CVE-2026-11946

An unauthenticated remote attacker can exhaust server memory via the GetEndpoints Discovery Service in open62541. The endpointUrl field of GetEndpointsRequest is not validated for length. An attacker can declare an arbitrarily large string up to 4.09 GB via the UInt32 length field delivered acros...

CVE-2026-11946

CVE-2026-11946 affects open62541 (1.4.0–1.4.16, 1.5.0–1.5.4, master). An unauthenticated remote attacker can exhaust server memory through GetEndpoints by sending an oversized endpointUrl in GetEndpointsRequest; length is not validated, allowing ~4.09 GB strings split across chunks, buffered in R...