PT-2026-56507

Name of the Vulnerable Software and Affected Versions Hono versions 4.3.3 through 4.12.26 Description The AWS API Gateway v1 adapter incorrectly de-duplicates repeated request header values by using a substring comparison instead of an exact match. This behavior can lead to the loss of distinct...

PYSEC-2026-1553 Litestar X-Forwarded-For Header Spoofing Vulnerability Enables Rate Limit Evasion

While testing Litestar's RateLimitMiddleware, I discovered that rate limits can be completely bypassed by manipulating the X-Forwarded-For header. This renders IP-based rate limiting ineffective against determined attackers. The Problem Litestar's RateLimitMiddleware uses cachekeyfromrequest to...

PYSEC-2026-842 When matrix-nio receives forwarded room keys, the receiver doesn't check if it requested the key from the forwarder

When matrix-nio before 0.20 requests a room key from our devices, it correctly accepts key forwards only if they are a response to a previous request. However, it doesn't check that the device that responded matches the device the key was requested from. This allows a malicious homeserver to inse...

CVE-2026-34198 Coolify: Password reset link poisoning via X-Forwarded-Host header spoofing

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.471, the TrustProxies middleware trusts all proxies $proxies = '', accepting X-Forwarded-Host from any source. The TrustHosts middleware, intended to prevent host header attacks...

CVE-2026-34198 Coolify: Password reset link poisoning via X-Forwarded-Host header spoofing

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.471, the TrustProxies middleware trusts all proxies $proxies = '', accepting X-Forwarded-Host from any source. The TrustHosts middleware, intended to prevent host header attacks...

CVE-2026-34198

CVE-2026-34198 concerns Coolify prior to 4.0.0-beta.471. The vulnerability stems from TrustProxies trusting all proxies and accepting X-Forwarded-Host from any source, combined with a circular dependency in TrustHosts that prevents host validation. As a result, when a password reset is requested,...

GHSA-7CFM-PQRJ-XGQ7 9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

Summary The 9router dashboard login rate limiter derives the client identity from the attacker-controlled X-Forwarded-For HTTP header. When 9router is directly exposed, or deployed behind a reverse proxy that does not overwrite untrusted forwarding headers, a remote attacker can rotate the...

9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

Summary The 9router dashboard login rate limiter derives the client identity from the attacker-controlled X-Forwarded-For HTTP header. When 9router is directly exposed, or deployed behind a reverse proxy that does not overwrite untrusted forwarding headers, a remote attacker can rotate the...

NPM: 9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

NPM: 9router: Login brute-force protection bypass via spoofed X-Forwarded-For header vulnerability discovered by ? in WordPress Npm 9router versions = 0.4.71...

CVE-2026-54764

Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's ForwardAuth middleware, even when configured with trustForwardHeader: false, derives the X-Forwarded-Port header sent to the authentication service from the original incoming request instead of t...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, enabling cross-app data access

Summary The workspace app proxy resolves the target app from httpapi.RequestHost which prefers the X-Forwarded-Host header over the real Host header. No middleware strips X-Forwarded-Host before routing and the header is not browser-forbidden so client-side JavaScript can set it on fetch calls...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

GHSA-5G4W-3VW9-478W Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, enabling cross-app data access

Summary The workspace app proxy resolves the target app from httpapi.RequestHost which prefers the X-Forwarded-Host header over the real Host header. No middleware strips X-Forwarded-Host before routing and the header is not browser-forbidden so client-side JavaScript can set it on fetch calls...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' in the httpapi.RequestHost process. An attacker can gain unauthorized access to sensitive data by sending requests with a crafted X-Forwarded-Host header, which is trusted over the real...