Security Bulletin: IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is susceptible to a Request/Response Smuggling vuln in Netty (CVE-2026-59898)

Summary Netty is used by IBM DevOps Deploy / IBM UrbanCode Deploy UCD as part of the server-agent communication systems. CVE-2026-59898. Vulnerability Details CVEID:CVE-2026-59898 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final an...

CVE-2026-59898

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 or V08 handshaker by sending Sec-WebSocket-Version: 7 and omitting Connection: Upgrade / Upgrade: websocket headers,...

CVE-2026-59898: Inconsistent Interpretation of HTTP Requests

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 or V08 handshaker by sending Sec-WebSocket-Version: 7 and omitting Connection: Upgrade / Upgrade: websocket headers,...