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TI-2025-30345 Aliases CVE-2025-47952GHSA-vrch-868g-9jx5

Traefik allows path traversal using url encoding

Priority LOW 22CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Traefik (pronounced traffic) is an HTTP reverse proxy and load balancer. Prior to versions 2.11.25 and 3.4.1, there is a potential vulnerability in Traefik managing the requests using a PathPrefix, Path or PathRegex matcher. When Traefik is configured to route the requests to a backend using a matcher based on the path, if the URL contains a URL encoded string in its path, it’s possible to target a backend, exposed using another router, by-passing the middlewares chain. This issue has been patched in versions 2.11.25 and 3.4.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00983 62nd percentileScored 2026-11-07
Fix Fixed traefik (traefik): 3.4.1, 2.11.25github.com/traefik/traefik/v3 (Go): 3.4.1+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
traefiktraefikbefore 3.4.1; before 2.11.253.4.1, 2.11.25Patch availableCNA
—github.com/traefik/traefik/v3 (Go)before 3.4.13.4.1Patch availableGHSA-vrch-868g-9jx5
—github.com/traefik/traefik/v2 (Go)before 2.11.252.11.25Patch availableGHSA-vrch-868g-9jx5
—github.com/traefik/traefik (Go)up to 1.7.34—No fix listedGHSA-vrch-868g-9jx5
  • traefik Vendortraefik Affected before 3.4.1; before 2.11.25 Fixed in 3.4.1, 2.11.25 Patch available CNA
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected before 3.4.1 Fixed in 3.4.1 Patch available GHSA-vrch-868g-9jx5
  • github.com/traefik/traefik/v2 (Go) Vendor— Affected before 2.11.25 Fixed in 2.11.25 Patch available GHSA-vrch-868g-9jx5
  • github.com/traefik/traefik (Go) Vendor— Affected up to 1.7.34 Fixed in — No fix listed GHSA-vrch-868g-9jx5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*before 2.11.25; 3.0.0 to before 3.4.1Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions before 2.11.25; 3.0.0 to before 3.4.1 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 3.4.1, 2.11.25
  • Fix · GHSA-vrch-868g-9jx5 github.com/traefik/traefik/v3 (Go) Fixed in 3.4.1 Advisory →
  • Fix · GHSA-vrch-868g-9jx5 github.com/traefik/traefik/v2 (Go) Fixed in 2.11.25 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-47952
  2. 2026-10-03 Alias added: GHSA-vrch-868g-9jx5

References

Patch 2

Advisory 1

Other 3

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-25774 Uncontrolled Resource Consumption in Traefik CVSS 3.1HIGH 7.5
  • TI-2025-40914 Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules CVSS 4.0MEDIUM 6.9
  • TI-2022-07529 Authorization header displayed in the debug logs CVSS 3.1MEDIUM 6.5
  • TI-2024-30459 HTTP client can remove the X-Forwarded headers in Traefik CVSS 3.1CRITICAL 9.8
  • TI-2026-60261 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect CVSS 4.0CRITICAL 9.3
See all 83 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences