CLSA-2026-1787754280 nghttp2: Fix of CVE-2026-58055

CVE-2026-58055: fix HTTP request/response smuggling via HTTP/1.1 Upgrade request with Content-Length...

CVE-2026-58055: Inconsistent Interpretation of HTTP Requests

nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting...