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TI-2026-60033 Aliases CVE-2026-88007GHSA-qqjf-53cj-pwvv

Traefik HTTP/3 Backend NTLM Connection Reuse

Priority MEDIUM 48CWE-287Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-287.

Summary

Traefik is an open source HTTP reverse proxy and load balancer. From 2.11.0 until 2.11.57 and 3.7.13, the HTTP/3 entrypoint ConnContext does not call service.AddTransportOnContext, so kerberosRoundTripper uses a shared backend transport instead of a transport dedicated to each frontend connection. With HTTP/3 enabled, a backend using connection-bound NTLM or Negotiate authentication, and backend keep-alive, an unrelated client can reuse a backend connection authenticated for a victim, read victim-only data, and act as that victim without the victim credentials. This issue is fixed in 2.11.57 and 3.7.13.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.006 48th percentileScored 2026-11-07
Fix Fixed traefik (traefik): 2.11.57, 3.7.13github.com/traefik/traefik/v3 (Go): 3.7.13+1 more productRed Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
traefiktraefik2.11.0 to before 2.11.57; 3.0.0 to before 3.7.132.11.57, 3.7.13Patch availableCNA
—github.com/traefik/traefik/v3 (Go)3.0.0 to before 3.7.133.7.13Patch availableGHSA-qqjf-53cj-pwvv
—github.com/traefik/traefik/v2 (Go)2.11.0 to before 2.11.572.11.57Patch availableGHSA-qqjf-53cj-pwvv
  • traefik Vendortraefik Affected 2.11.0 to before 2.11.57; 3.0.0 to before 3.7.13 Fixed in 2.11.57, 3.7.13 Patch available CNA
  • github.com/traefik/traefik/v3 (Go) Vendor— Affected 3.0.0 to before 3.7.13 Fixed in 3.7.13 Patch available GHSA-qqjf-53cj-pwvv
  • github.com/traefik/traefik/v2 (Go) Vendor— Affected 2.11.0 to before 2.11.57 Fixed in 2.11.57 Patch available GHSA-qqjf-53cj-pwvv

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*2.8.2 to before 2.11.56; 3.0.0 to before 3.7.12Vulnerabletraefik
  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions 2.8.2 to before 2.11.56; 3.0.0 to before 3.7.12 Vulnerable ·traefik

Remediation

  • Fix · CNA traefik (traefik) Fixed in 2.11.57, 3.7.13
  • Fix · GHSA-qqjf-53cj-pwvv github.com/traefik/traefik/v3 (Go) Fixed in 3.7.13 Advisory →
  • Fix · GHSA-qqjf-53cj-pwvv github.com/traefik/traefik/v2 (Go) Fixed in 2.11.57 Advisory →

Red Hat 1 advisory

  • RHSA-2026:90321 Released 2026-10-26 · Red Hat rating Critical
    Red Hat OpenShift Dev Spaces 3.31.0 Release.
    • Red Hat OpenShift Dev Spaces 3.31 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/dashboard-rhel9, registry.redhat.io/devspaces/jetbrains-ide-rhel9 +8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift Dev Spaces 3.31Fixed RHSA-2026:90321
Not affected: 1 product
  • Red Hat OpenShift Dev Spaces 3.31

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-88007
  2. 2026-10-03 Alias added: GHSA-qqjf-53cj-pwvv
  3. 2026-10-29 Fix available: Red Hat OpenShift Dev Spaces 3.31 · Red Hat
  4. 2026-10-30 Fix available: RHSA-2026:90321 · Red Hat

References

Patch 3

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