nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests

A flaw in nghttp2's nghttpx proxy allows a remote attacker to perform HTTP request smuggling and cross-client response-queue poisoning. This occurs because the proxy ambiguously forwards HTTP/1.1 Upgrade requests that contain a Content-Length header to reusable keep-alive backend connections...

CVE-2026-48931

A flaw was found in Node.js HTTP Agent. This vulnerability allows a client to accept a server response as valid even before the client has sent its request. This can lead to unexpected behavior and potentially information disclosure. Mitigation Limit outbound HTTP/1.1 from Node.js clients to...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling through the CONNECT handling path and the shared backend transport. An attacker can make another client read attacker-smuggled backend output by sending an HTTP/2 or HTTP/3 CONNECT request with a body that Traefik...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling through the CONNECT handling path and the shared backend transport. An attacker can make another client read attacker-smuggled backend output by sending an HTTP/2 or HTTP/3 CONNECT request with a body that Traefik...

CVE-2026-71324 Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...

EUVD-2026-54288

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...

EulerOS 2.0 SP15 : libsoup (EulerOS-SA-2026-2894)

According to the versions of the libsoup packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in SoupServer. This HTTP request smuggling vulnerability occurs because SoupServer improperly handles requests that combine...

EulerOS 2.0 SP15 : libsoup (EulerOS-SA-2026-2935)

According to the versions of the libsoup packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : A flaw was found in SoupServer. This HTTP request smuggling vulnerability occurs because SoupServer improperly handles requests that combine...

JLSEC-2026-1157 nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a...

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...

Exposure of Data Element to Wrong Session

Overview org.eclipse.jetty:jetty-server is a lightweight highly scalable java based web server and servlet engine. Affected versions of this package are vulnerable to Exposure of Data Element to Wrong Session due to the connection-scoped trailers handling in the HTTP/1.1 request processing path. ...

Eclipse Jetty: Cross-Request Leakage for trailers on HTTP/1.1 keep-alive connections

Description FINDING — MEDIUM HTTP/1.1 keep-alive connections with trailers HttpConnection.trailers Cross-Request Leakage Never Reset Between Requests Location: jetty-core/jetty-server/src/main/java/org/eclipse/jetty/server/internal/ HttpConnection.java:107, 1157-1161, 1170 Detail: trailers line 1...

GHSA-F4V5-65JJ-PCR2 Eclipse Jetty: Cross-Request Leakage for trailers on HTTP/1.1 keep-alive connections

Description FINDING — MEDIUM HTTP/1.1 keep-alive connections with trailers HttpConnection.trailers Cross-Request Leakage Never Reset Between Requests Location: jetty-core/jetty-server/src/main/java/org/eclipse/jetty/server/internal/ HttpConnection.java:107, 1157-1161, 1170 Detail: trailers line 1...

undici: Undici: Response queue poisoning on reused keep-alive sockets can lead to incorrect response delivery.

A flaw was found in undici. An attacker-controlled upstream server can exploit a vulnerability in Undici's HTTP/1.1 client, specifically related to response queue poisoning on reused keep-alive sockets. This allows the attacker to inject an unsolicited HTTP/1.1 response onto an idle socket...

RHEL 8 : nodejs:22 (RHSA-2026:41947)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:41947 advisory. Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language...

CVE-2026-59249

Inconsistent interpretation of HTTP requests HTTP response smuggling vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on the same pooled connection, enabling response-queue poisoning against subsequent requests that shar...

CVE-2026-59249

Inconsistent interpretation of HTTP requests HTTP response smuggling vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on the same pooled connection, enabling response-queue poisoning against subsequent requests that shar...

EUVD-2026-44909

Inconsistent interpretation of HTTP requests HTTP response smuggling vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on the same pooled connection, enabling response-queue poisoning against subsequent requests that shar...

CVE-2026-59249 Sign-tolerant HTTP/1 chunk-size parser in Mint enables response smuggling against strict intermediaries on pooled connections

Inconsistent interpretation of HTTP requests HTTP response smuggling vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on the same pooled connection, enabling response-queue poisoning against subsequent requests that shar...