HTTP3-attacks

HTTP3-attacks CVE-2022-30592 Based on the work: E. Chatzoglou, V. Kouliaridis, G. Kambourakis, G. Karopoulos, and S. Gritzalis,"A hands-on gaze on HTTP/3 security through the lens of HTTP/2 and a public dataset", Computers & Security, p. 103051, 2022. The current repository serves the purpose of...

ssh3

!NOTE SSH3 is probably going to change its name. It is still the SSH Connection Protocol RFC4254 running on top of HTTP/3 Extended connect, but the required changes are heavy and too distant from the philosophy of popular SSH implementations to be considered for integration. The specification dra...

Traefik HTTP/3 Backend NTLM Connection Reuse

Summary Traefik's HTTP/3 request path did not initialize the connection-scoped backend transport holder that isolates connection-bound NTLM and Negotiate Kerberos authentication on the HTTP/1.1 and HTTP/2 paths. The HTTP/3 entrypoint reuses the HTTPS handler chain and reaches the same backend...

GHSA-QQJF-53CJ-PWVV Traefik HTTP/3 Backend NTLM Connection Reuse

Summary Traefik's HTTP/3 request path did not initialize the connection-scoped backend transport holder that isolates connection-bound NTLM and Negotiate Kerberos authentication on the HTTP/1.1 and HTTP/2 paths. The HTTP/3 entrypoint reuses the HTTPS handler chain and reaches the same backend...

GHSA-7GHQ-V6JF-G56C Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

Summary There is a medium severity vulnerability in Traefik's HTTP/3 entry points: the respondingTimeouts settings were not applied to the HTTP/3 request path. readTimeout in particular is on by default at 60s and is documented as bounding the time to read the entire request including its body, b...

Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

Summary There is a medium severity vulnerability in Traefik's HTTP/3 entry points: the respondingTimeouts settings were not applied to the HTTP/3 request path. readTimeout in particular is on by default at 60s and is documented as bounding the time to read the entire request including its body, b...

CVE-2026-88012

Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream...

CVE-2026-88012 Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream...

CVE-2026-88012

Traefik , the open-source HTTP reverse proxy and load balancer, has a flaw in how HTTP/3 entrypoints handle respondingTimeouts.readTimeout . The timeout is enforced at the TCP layer, but HTTP/3 operates over QUIC , which has no corresponding stream deadline. This means an unauthenticated attacker...

EUVD-2026-75562

Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream...

CVE-2026-88007

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection...

CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection...

EUVD-2026-75544

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection...

CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection...

CVE-2026-88007

Traefik versions 2.11.0 through 2.11.57 and 3.7.13 contain a backend connection reuse flaw in the HTTP/3 entrypoint. The ConnContext does not call service.AddTransportOnContext, causing kerberosRoundTripper to share a single backend transport across all frontend connections rather than using a de...

CVE-2026-88878

Traefik is an HTTP reverse proxy and load balancer. In versions = v2.8.2 through = v3.0.0 through .transport.respondingTimeouts settings — notably readTimeout, which is enabled by default at 60s — are not applied to the HTTP/3 request path. readTimeout is enforced as a deadline on the underlying...

EUVD-2026-75428

Traefik is an HTTP reverse proxy and load balancer. In versions = v2.8.2 through = v3.0.0 through .transport.respondingTimeouts settings — notably readTimeout, which is enabled by default at 60s — are not applied to the HTTP/3 request path. readTimeout is enforced as a deadline on the underlying...

CVE-2026-88878

Traefik (HTTP reverse proxy and load balancer) versions v2.8.2 through v2.11.55 and v3.0.0 through v3.7.11 are affected by an HTTP/3 timeout bypass. The respondingTimeouts settings (notably readTimeout, default 60s) are not applied to the HTTP/3 request path because readTimeout is enforced as a d...

CVE-2026-88878 Traefik v2.8.2 through v3.6 HTTP/3 Timeout Bypass

Traefik is an HTTP reverse proxy and load balancer. In versions = v2.8.2 through = v3.0.0 through .transport.respondingTimeouts settings — notably readTimeout, which is enabled by default at 60s — are not applied to the HTTP/3 request path. readTimeout is enforced as a deadline on the underlying...

HTTP3ONSTEROIDS

Table of contents Vulnerability Description Source Code Review Lab Setup Identifying the issue References Vulnerability Description HAProxy's HTTP/3 implementation fails to block a malformed HTTP header field name , and when deployed in front of a server that incorrectly process this malformed...