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TI-2026-47605 Aliases CVE-2026-67309GHSA-8rxv-jg7p-wvg3

Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass

Priority MEDIUM 41CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-288.

Summary

Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00659 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed traefik (traefik): 3.7.8github.com/traefik/traefik/v3 (Go): 3.7.8

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
traefiktraefik3.7.0 to before 3.7.83.7.8Patch availableCNA
—github.com/traefik/traefik/v3 (Go)3.7.0 to before 3.7.83.7.8Patch availableGHSA-8rxv-jg7p-wvg3
  • traefik Vendortraefik Affected 3.7.0 to before 3.7.8 Fixed in 3.7.8 Patch available CNA
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.7.0 to before 3.7.8 Fixed in 3.7.8 Patch available GHSA-8rxv-jg7p-wvg3

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*3.7.0 to before 3.7.8Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions 3.7.0 to before 3.7.8 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 3.7.8
  • Fix · GHSA-8rxv-jg7p-wvg3 github.com/traefik/traefik/v3 (Go) Fixed in 3.7.8 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

Not affected: 2 products
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift GitOps

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-67309
  2. 2026-10-03 Alias added: GHSA-8rxv-jg7p-wvg3
  3. 2026-10-09 EPSS moved to the 50th–90th percentile

References

Exploit 1

Patch 2

Advisory 1

Other 2

  • 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