CVE-2026-35051

HIGH EPSS 16.8%
Published Apr 30, 20262mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 4.0
High
Find Similar
Published Apr 30, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

CVSS Details

Base Score
7.8
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
16.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-345

Affected Products 6

VendorProductVersionRange
traefiktraefik* <2.11.43
traefiktraefik*≥3.0.0  –  <3.6.14
traefiktraefik3.7.0any
traefiktraefik3.7.0any
traefiktraefik3.7.0any
traefiktraefik3.7.0any

References 4

  • github.com https://github.com/traefik/traefik/releases/tag/v2.11.43
    ProductRelease Notes
  • github.com https://github.com/traefik/traefik/releases/tag/v3.6.14
    ProductRelease Notes
  • github.com https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.2
    ProductRelease Notes
  • github.com https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54
    ExploitPatchVendor Advisory

Remediation

  • github.com https://github.com/traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54
    ExploitPatchVendor Advisory