CVE-2026-48020

HIGH EPSS 37.1%
Published Jun 23, 20266d ago · Modified Jun 24, 20266d ago
7.8 CVSS 4.0
High
Find Similar
Published Jun 23, 2026 6d ago
Last Modified Jun 24, 2026 6d ago

Description

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.48, 3.6.19, and 3.7.3, there is a high severity vulnerability in Traefik's StripPrefix middleware that allows an unauthenticated attacker to bypass route-level authentication and authorization. When a public router matches on a PathPrefix rule and applies the StripPrefix middleware, a request path containing .. or its percent-encoded form %2e%2e can match the public route at routing time and then, after the prefix is stripped and the path is normalized, resolve to a path served by a separate, authenticated router. As a result, an attacker can reach protected backend paths — such as admin or internal configuration endpoints — without satisfying the authentication middleware attached to the protected router. This vulnerability is fixed in 2.11.48, 3.6.19, and 3.7.3.

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:H/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
37.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-288

References 4

  • github.com https://github.com/traefik/traefik/releases/tag/v2.11.48
  • github.com https://github.com/traefik/traefik/releases/tag/v3.6.19
  • github.com https://github.com/traefik/traefik/releases/tag/v3.7.3
  • github.com https://github.com/traefik/traefik/security/advisories/GHSA-xf64-8mw2-4gr2

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.