Tinyproxy < 1.11.2 - Use After Free in HTTP Connection Header

A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.10.0 through 1.11.1. The removeconnectionheaders function in reqs.c frees a header value pointer that is subsequently reused during header iteration, leading to memory corruption. An unauthenticated remote...

Pingora forwards client-nominated Connection headers to HTTP/1 upstreams, allowing ACL bypass in specific chained deployments

Pingora versions prior to 0.9.0 passed the downstream request through upstreamrequestfilter and wrote it to HTTP/1 upstreams without removing the client's Connection header, other hop-by-hop headers, or the headers Connection nominated, although RFC 9110 Section 7.6.1 requires intermediaries to...

CVE-2026-105299

Summary Before version 0.9.0, the HTTP/1 upstream path in pingora-proxy passed the downstream request through upstreamrequestfilter and wrote it to the upstream without removing the client's Connection header, other hop-by-hop headers, or the headers Connection nominated, although RFC 9110 Sectio...

CVE-2026-105299 Pingora forwards client-nominated Connection headers to HTTP/1 upstreams, allowing ACL bypass in specific chained deployments

Summary Before version 0.9.0, the HTTP/1 upstream path in pingora-proxy passed the downstream request through upstreamrequestfilter and wrote it to the upstream without removing the client's Connection header, other hop-by-hop headers, or the headers Connection nominated, although RFC 9110 Sectio...

CVE-2026-105299

Versions of pingora-proxy before 0.9.0 are vulnerable to an ACL bypass because the HTTP/1 upstream path fails to remove client-nominated Connection headers and associated hop-by-hop headers, violating RFC 9110. An attacker can nominate a header that the application subsequently adds in upstream_r...

CVE-2026-105299 Pingora forwards client-nominated Connection headers to HTTP/1 upstreams, allowing ACL bypass in specific chained deployments

Summary Before version 0.9.0, the HTTP/1 upstream path in pingora-proxy passed the downstream request through upstreamrequestfilter and wrote it to the upstream without removing the client's Connection header, other hop-by-hop headers, or the headers Connection nominated, although RFC 9110 Sectio...

CVE-2026-105299 Pingora forwards client-nominated Connection headers to HTTP/1 upstreams, allowing ACL bypass in specific chained deployments

Summary Before version 0.9.0, the HTTP/1 upstream path in pingora-proxy passed the downstream request through upstreamrequestfilter and wrote it to the upstream without removing the client's Connection header, other hop-by-hop headers, or the headers Connection nominated, although RFC 9110 Sectio...

GO-2026-6566 Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header in github.com/fabiolb/fabio

Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers clientip/tls/requestid still strippable via the Connection header in github.com/fabiolb/fabio...

EUVD-2026-83986

Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers clientip/tls/requestid still strippable via the Connection header...

GHSA-FQ95-V8XC-JM3V Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header

Affected: github.com/fabiolb/fabio = 1.6.6 through 1.7.1 and master HEAD c75f8a6. Summary The v1.6.6 fix for CVE-2025-48865 sweeps the client Connection header against a hardcoded allowlist protectHeaders proxy/httpheaders.go:28-36 containing only the 7 X-Forwarded family headers. Fabio also...

Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header

Affected: github.com/fabiolb/fabio = 1.6.6 through 1.7.1 and master HEAD c75f8a6. Summary The v1.6.6 fix for CVE-2025-48865 sweeps the client Connection header against a hardcoded allowlist protectHeaders proxy/httpheaders.go:28-36 containing only the 7 X-Forwarded family headers. Fabio also...

SUSE CVE-2026-88008

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching...

CVE-2026-62987 Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header

Fabio is an HTTPS and TCP router for deploying applications managed by consul. From 1.6.6 until 1.7.2, the CVE-2025-48865 fix in proxy/httpheaders.go uses protectHeaders for a hardcoded set of forwarded headers but omits the operator-configured ClientIPHeader, TLSHeader, and RequestID names. In...

CVE-2026-62987 Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header

Fabio is an HTTPS and TCP router for deploying applications managed by consul. From 1.6.6 until 1.7.2, the CVE-2025-48865 fix in proxy/httpheaders.go uses protectHeaders for a hardcoded set of forwarded headers but omits the operator-configured ClientIPHeader, TLSHeader, and RequestID names. In...

CVE-2026-62987 Fabio - Incomplete fix for CVE-2025-48865: operator-configured trust headers (clientip/tls/requestid) still strippable via the Connection header

Fabio is an HTTPS and TCP router for deploying applications managed by consul. From 1.6.6 until 1.7.2, the CVE-2025-48865 fix in proxy/httpheaders.go uses protectHeaders for a hardcoded set of forwarded headers but omits the operator-configured ClientIPHeader, TLSHeader, and RequestID names. In...

CVE-2026-62987

Fabio (an HTTP/S and TCP router for Consul-managed applications) versions 1.6.6 through 1.7.2 contain an incomplete fix for CVE-2025-48865 . The protectHeaders logic in proxy/http_headers.go covers a hardcoded set of forwarded headers but omits operator-configured ClientIPHeader , TLSHeader , and...

CVE-2026-88008

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching...

CVE-2026-88008

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching...

CVE-2026-88008: Inconsistent Interpretation of HTTP Requests

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching...

CVE-2026-71849

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.7.0 to 4.12.33, the Proxy Helper proxy function in hono/proxy does not remove response headers named by the origin's Connection header. Per RFC 9110 Section 7.6.1, an intermediary must remove the header...