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TI-2026-46763 Aliases CVE-2026-65600GHSA-cxjq-mrr5-89rv

Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex

Priority MEDIUM 41CWE-22Published · Updated

Key facts

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

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

Summary

Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00621 50th percentileScored 2026-11-07
Fix Fixed traefik (traefik): 2.11.52, 3.6.23, 3.7.7github.com/traefik/traefik/v2 (Go): 2.11.52+1 more productRed Hat: 1 advisory

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 2.11.522.11.52Patch availableCNA
traefiktraefik3.6.0 to before 3.6.233.6.23Patch availableCNA
traefiktraefik3.7.0 to before 3.7.73.7.7Patch availableCNA
—github.com/traefik/traefik/v2 (Go)before 2.11.522.11.52Patch availableGHSA-cxjq-mrr5-89rv
—github.com/traefik/traefik/v3 (Go)before 3.6.233.6.23Patch availableGHSA-cxjq-mrr5-89rv
—github.com/traefik/traefik/v3 (Go)3.7.0 to before 3.7.73.7.7Patch availableGHSA-cxjq-mrr5-89rv
—github.com/traefik/traefik (Go)up to 1.7.34—No fix listedGHSA-cxjq-mrr5-89rv
  • traefik Vendortraefik Affected before 2.11.52 Fixed in 2.11.52 Patch available CNA
  • traefik Vendortraefik Affected 3.6.0 to before 3.6.23 Fixed in 3.6.23 Patch available CNA
  • traefik Vendortraefik Affected 3.7.0 to before 3.7.7 Fixed in 3.7.7 Patch available CNA
  • github.com/traefik/traefik/v2 (Go) Vendor— Affected before 2.11.52 Fixed in 2.11.52 Patch available GHSA-cxjq-mrr5-89rv
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected before 3.6.23 Fixed in 3.6.23 Patch available GHSA-cxjq-mrr5-89rv
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.7.0 to before 3.7.7 Fixed in 3.7.7 Patch available GHSA-cxjq-mrr5-89rv
  • github.com/traefik/traefik (Go) Vendor— Affected up to 1.7.34 Fixed in — No fix listed GHSA-cxjq-mrr5-89rv

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*before 2.11.52Vulnerabletraefik
cpe:2.3:a:traefik:traefik:*:-:*:*:*:*:*:*3.6.0 to before 3.6.23; 3.7.0 to before 3.7.7Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions before 2.11.52 Vulnerable ·traefik
  • cpe:2.3:a:traefik:traefik:*:-:*:*:*:*:*:* Versions 3.6.0 to before 3.6.23; 3.7.0 to before 3.7.7 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 2.11.52
  • Fix · CNA traefik (traefik) Fixed in 3.6.23
  • Fix · CNA traefik (traefik) Fixed in 3.7.7
  • Fix · GHSA-cxjq-mrr5-89rv github.com/traefik/traefik/v2 (Go) Fixed in 2.11.52 Advisory →
  • Fix · GHSA-cxjq-mrr5-89rv github.com/traefik/traefik/v3 (Go) Fixed in 3.6.23 Advisory →
  • Fix · GHSA-cxjq-mrr5-89rv github.com/traefik/traefik/v3 (Go) Fixed in 3.7.7 Advisory →

Red Hat 1 advisory

  • RHSA-2026:62260 Released 2026-09-01 · Red Hat rating Important
    Red Hat OpenShift Dev Spaces 3.30.0 Release.
    • Red Hat OpenShift Dev Spaces 3.30 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/configbump-rhel9, registry.redhat.io/devspaces/dashboard-rhel9 +7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    traefik 3.7.7

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-46764 Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRefPriority LOW 25
    • TI-2026-46765 Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace BypassPriority LOW 24
    Show all 3 records →
  • Release ·

    traefik 3.6.23

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-46765 Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace BypassPriority LOW 24
    Show all 2 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift Dev Spaces 3.30Fixed RHSA-2026:62260
Not affected: 1 product
  • Red Hat OpenShift Dev Spaces 3.30

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65600
  2. 2026-10-03 Alias added: GHSA-cxjq-mrr5-89rv
  3. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 1

Other 5

  • 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