CVE-2026-59899

Ein Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Sicherheitsprüfungen zu umgehen, Anfragen oder Header zu manipulieren, Zertifikatsprüfungen zu unterlaufen sowie einen Denial of Service zu verursachen.

SICK CorivaEngine includes the third-party components Netty and Spring Cloud Gateway that are affected by multiple known vulnerabilities. Under certain conditions, these vulnerabilities could allow remote attackers to perform HTTP request smuggling, cause resource exhaustion, or manipulate forwarded request headers. Successful exploitation may impact the integrity and availability of affected systems. SICK has addressed these vulnerabilities and recommends that customers apply the remediations described in this Security Advisory.

### Impact `HttpContentEncoder` (the superclass of the production handler `HttpContentCompressor`) maintains a per-channel `ArrayDeque<CharSequence>` named `acceptEncodingQueue` that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses.