HTTP Request Smuggling

Http4s is vulnerable to HTTP Request Smuggling. The vulnerability is due to inconsistent HTTP message body framing between Ember and an intermediary when both headers are present, which allows an attacker to smuggle a second request, bypass access controls, poison caches, or cause a victim reques...

CVE-2026-69204

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/1.1 does not reject messages containing both Transfer-Encoding and Content-Length, so an intermediary and Ember can select different body framing rules. When ember-server is behind a keep-alive intermediary...

Linux Distros Unpatched Vulnerability : CVE-2026-18540

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - undici's retry interceptor can append the body of a ranged retry response to bytes already delivered from an earlier partial response while still presenting the...

AZL-99939 CVE-2026-18540 affecting package nodejs 24.21.0-1

undici's retry interceptor can append the body of a ranged retry response to bytes already delivered from an earlier partial response while still presenting the original response's status and headers. This happens when an upstream server delivers part of a body without a trustworthy resume...