CVE-2024-45410

CRITICAL LAB

Traefik X-Forwarded Headers - Hop-by-Hop Header Manipulation

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-45410. PoCs published by jphetphoumy.

AI-analyzed exploit summary This repository contains a functional PoC for CVE-2024-45410, demonstrating an authentication bypass via manipulation of hop-by-hop headers (e.g., X-Forwarded-Host) in Traefik. The Flask backend checks for a trusted host header, which can be bypassed using crafted HTTP headers.

Description

Traefik is a golang, Cloud Native Application Proxy. When a HTTP request is processed by Traefik, certain HTTP headers such as X-Forwarded-Host or X-Forwarded-Port are added by Traefik before the request is routed to the application. For a HTTP client, it should not be possible to remove or modify these headers. Since the application trusts the value of these headers, security implications might arise, if they can be modified. For HTTP/1.1, however, it was found that some of theses custom headers can indeed be removed and in certain cases manipulated. The attack relies on the HTTP/1.1 behavior, that headers can be defined as hop-by-hop via the HTTP Connection header. This issue has been addressed in release versions 2.11.9 and 3.1.3. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Exploits (1)

nomisec WORKING POC 4 stars
by jphetphoumy · poc
https://github.com/jphetphoumy/traefik-CVE-2024-45410-poc

This repository contains a functional PoC for CVE-2024-45410, demonstrating an authentication bypass via manipulation of hop-by-hop headers (e.g., X-Forwarded-Host) in Traefik. The Flask backend checks for a trusted host header, which can be bypassed using crafted HTTP headers.

Classification
Working Poc 90%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Traefik v3.1 (with Flask backend)
No auth needed
Prerequisites: Docker Compose · Traefik v3.1 · Flask application
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 9.8
EPSS 0.1395
EPSS Percentile 94.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Lab Environment

COMMUNITY
Community Lab
docker pull traefik:v3.1

Details

CWE
CWE-345 CWE-348
Status published
Products (3)
traefik/traefik < 2.11.9
traefik/traefik 0 - 2.11.9 (2 CPE variants)Go
traefik/traefik 3.0.0-beta3 - 3.1.3Go
Published Sep 19, 2024
Tracked Since Feb 18, 2026