TI-2022-07684 Aliases CVE-2022-23632 GHSA-hrhx-6h34-j5hc

Traefik skips the router TLS configuration when the host header is an FQDN

LOW 38CWE-295Published 2022-02-17 · Updated 2025-04-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: None · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.

Summary

Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.6.1, Traefik skips the router transport layer security (TLS) configuration when the host header is a fully qualified domain name (FQDN). For a request, the TLS configuration choice can be different than the router choice, which implies the use of a wrong TLS configuration. When sending a request using FQDN handled by a router configured with a dedicated TLS configuration, the TLS configuration falls back to the default configuration that might not correspond to the configured one. If the CNAME flattening is enabled, the selected TLS configuration is the SNI one and the routing uses the CNAME value, so this can skip the expected TLS configuration. Version 2.6.1 contains a patch for this issue. As a workaround, one may add the FDQN to the host rule. However, there is no workaround if the CNAME flattening is enabled.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01714 77th percentileScored 2026-11-07

Fix Fixed traefik (traefik): 2.6.1github.com/traefik/traefik/v2 (Go): 2.6.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
traefik	traefik	before 2.6.1	2.6.1	Patch available	CNA
—	github.com/traefik/traefik/v2 (Go)	before 2.6.1	2.6.1	Patch available	GHSA-hrhx-6h34-j5hc

traefik Vendortraefik Affected before 2.6.1 Fixed in 2.6.1 Patch available CNA
github.com/traefik/traefik/v2 (Go) Vendor— Affected before 2.6.1 Fixed in 2.6.1 Patch available GHSA-hrhx-6h34-j5hc

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:traefik:traefik::::::::	before 2.6.1	Vulnerable	traefik
cpe:2.3:a:oracle:communications_unified_inventory_management:7.5.0:::::::*	7.5.0	Vulnerable	Oracle

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions before 2.6.1 Vulnerable ·traefik
cpe:2.3:a:oracle:communications_unified_inventory_management:7.5.0:*:*:*:*:*:*:* Versions 7.5.0 Vulnerable ·Oracle

Remediation

Fix · CNA traefik (traefik) Fixed in 2.6.1
Fix · GHSA-hrhx-6h34-j5hc github.com/traefik/traefik/v2 (Go) Fixed in 2.6.1 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2022-23632
2026-10-03 Alias added: GHSA-hrhx-6h34-j5hc

References

Patch 2

Advisory 3

Other 1

https://github.com/traefik/traefik

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