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TI-2026-25187 Aliases CVE-2026-32695GHSA-67jx-r9pv-98rj

Traefik has Knative Ingress Rule Injection that Allows Host Restriction Bypass

Priority LOW 28CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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 is an HTTP reverse proxy and load balancer. Prior to versions 3.6.11 and 3.7.0-ea.2, Traefik's Knative provider builds router rules by interpolating user-controlled values into backtick-delimited rule expressions without escaping. In live cluster validation, Knative `rules[].hosts[]` was exploitable for host restriction bypass (for example `tenant.example.com`) || Host(`attacker.com`), producing a router that serves attacker-controlled hosts. Knative `headers[].exact` also allows rule-syntax injection and proves unsafe rule construction. In multi-tenant clusters, this can route unauthorized traffic to victim services and lead to cross-tenant traffic exposure. Versions 3.6.11 and 3.7.0-ea.2 patch the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00471 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed traefik (traefik): 3.6.11, 3.7.0-ea.2github.com/traefik/traefik/v3 (Go): 3.6.11, 3.7.0-ea.2Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 3.6.11; 3.7.0-ea.1 to before 3.7.0-ea.23.6.11, 3.7.0-ea.2Patch availableCNA
—github.com/traefik/traefik/v3 (Go)before 3.6.113.6.11Patch availableGHSA-67jx-r9pv-98rj
—github.com/traefik/traefik/v3 (Go)3.7.0-ea.1 to before 3.7.0-ea.23.7.0-ea.2Patch availableGHSA-67jx-r9pv-98rj
—github.com/traefik/traefik/v2 (Go)up to 2.11.42—No fix listedGHSA-67jx-r9pv-98rj
  • traefik Vendortraefik Affected before 3.6.11; 3.7.0-ea.1 to before 3.7.0-ea.2 Fixed in 3.6.11, 3.7.0-ea.2 Patch available CNA
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected before 3.6.11 Fixed in 3.6.11 Patch available GHSA-67jx-r9pv-98rj
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.7.0-ea.1 to before 3.7.0-ea.2 Fixed in 3.7.0-ea.2 Patch available GHSA-67jx-r9pv-98rj
  • github.com/traefik/traefik/v2 (Go) Vendor— Affected up to 2.11.42 Fixed in — No fix listed GHSA-67jx-r9pv-98rj

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*before 3.6.11Vulnerabletraefik
cpe:2.3:a:traefik:traefik:3.7.0:ea1:*:*:*:*:*:*3.7.0 ea1Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions before 3.6.11 Vulnerable ·traefik
  • cpe:2.3:a:traefik:traefik:3.7.0:ea1:*:*:*:*:*:* Versions 3.7.0 ea1 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 3.6.11, 3.7.0-ea.2
  • Fix · GHSA-67jx-r9pv-98rj github.com/traefik/traefik/v3 (Go) Fixed in 3.6.11 Advisory →
  • Fix · GHSA-67jx-r9pv-98rj github.com/traefik/traefik/v3 (Go) Fixed in 3.7.0-ea.2 Advisory →

Red Hat 1 advisory

  • RHSA-2026:10175 Released 2026-04-23 · Red Hat rating Important
    Red Hat OpenShift Dev Spaces 3.27.1 Release.
    • Red Hat OpenShift Dev Spaces 3.27 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/dashboard-rhel9, registry.redhat.io/devspaces/devspaces-rhel9-operator +8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift Dev Spaces 3.27Fixed RHSA-2026:10175
Not affected: 1 product
  • Red Hat OpenShift Dev Spaces 3.27

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-32695
  2. 2026-10-03 Alias added: GHSA-67jx-r9pv-98rj

References

Exploit 1

Advisory 1

Other 4

  • 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