CVE-2026-2833

CVE-2026-2833 / Pingora HTTP request smuggling via premature Upgrade . Affected product: Pingora proxy in standalone deployments. Vulnerability: HTTP/1.1 upgrade handling allows forwarding the bytes after an Upgrade header to the backend before the backend accepts the upgrade (CWE-444), potential...

HTTP Request Smuggling via Premature Upgrade

Pingora versions prior to 0.8.0 would immediately forward bytes following a request with an Upgrade header to the backend, without waiting for a 101 Switching Protocols response. This allows an attacker to smuggle requests to the backend and bypass proxy-level security controls. This vulnerabilit...

PT-2026-23080

Name of the Vulnerable Software and Affected Versions Pingora versions prior to 0.8.0 Description An HTTP request smuggling issue CWE-444 exists in Pingora's handling of HTTP/1.1 connection upgrades. The issue arises when the proxy reads a request with an Upgrade header and forwards the remaining...

USN-8024-1: Libwebsockets vulnerabilities

Raffaele Bova discovered that Libwebsockets incorrectly handled memory when the upgrade header is not valid in the WebSocket server. An attacker could possibly use this issue to cause a denial of service. CVE-2025-11677 Raffaele Bova discovered that Libwebsockets did not properly check the size o...

Exploit for Improper Handling of Exceptional Conditions in Sockjs_Project Sockjs

CVE-2020-7693 Poc Note: I Confirm Payload for CVE-2020-76...

Important: ecs-service-connect-agent

Issue Overview: Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 wh...

Important: ecs-service-connect-agent

Issue Overview: Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 wh...

Important: ecs-service-connect-agent

Issue Overview: Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 wh...

Denial Of Service (DoS)

ws is vulnerable to Denial Of Service DoS. The vulnerability is due to improper handling of the Upgrade header when the number of received headers exceeds the server.maxHeadersCount or request.maxHeadersCount threshold, causing incomingMessage.headers.upgrade to not be set. Attackers can use this...

CVE-2024-23326

Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 when switching...

CVE-2024-23326 Envoy incorrectly accepts HTTP 200 response for entering upgrade mode

Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 when switching...

CVE-2024-23326 Envoy incorrectly accepts HTTP 200 response for entering upgrade mode

Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230section-6.7 a server sends 101 when switching...

PT-2024-19809 · Envoy · Envoy

Name of the Vulnerable Software and Affected Versions: Envoy affected versions not specified Description: A theoretical request smuggling issue exists in Envoy, a cloud-native, open source edge and service proxy. This occurs when a server is tricked into adding an upgrade header into a response...

SUSE CVE-2023-26103

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service ReDoS due to the upgradeWebSocket function, which contains regexes in the form of /s,s/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to...

PT-2023-20490

Name of the Vulnerable Software and Affected Versions deno versions prior to 1.31.0 Description The issue is related to Regular Expression Denial of Service ReDoS due to the upgradeWebSocket function, which contains regexes in the form of /s,s/, used for splitting the Connection/Upgrade header. A...

CVE-2023-26103: Inefficient Regular Expression Complexity

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service ReDoS due to the upgradeWebSocket function, which contains regexes in the form of /s,s/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to...

Regular Expression Denial of Service (ReDoS)

Overview deno is an a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS due to the upgradeWebSocket function, which contains regexes in the form of /s,s/...

Improper Input Validation in SocksJS-Node

Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20...

GHSA-C9G6-9335-X697 Improper Input Validation in SocksJS-Node

Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20...

CVE-2020-7693

Incorrect handling of Upgrade header with the value websocket leads in crashing of containers hosting sockjs apps. This affects the package sockjs before 0.3.20. Mitigation There is no mitigation for this issue, the flaw can only be resolved by applying updates...