TI-2026-23363 Aliases CVE-2026-29777 GHSA-8q2w-wr49-whqj

Traefik has a kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values

LOW 27CWE-74Published 2026-03-11 · Updated 2026-03-11

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · None
Fix status: Partial Red Hat: 1 without a fix

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 3.6.10, A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query parameter match values. In shared gateway deployments, this can bypass listener hostname constraints and redirect traffic for victim hostnames to attacker-controlled backends. This vulnerability is fixed in 3.6.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00312 24th percentileScored 2026-11-07

Fix Partial traefik (traefik): 3.6.10github.com/traefik/traefik/v3 (Go): 3.6.10Red Hat: 1 without a fix

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

Vendor	Product	Affected versions	Fixed in	Status	Source
traefik	traefik	before 3.6.10	3.6.10	Patch available	CNA
—	github.com/traefik/traefik/v3 (Go)	before 3.6.10	3.6.10	Patch available	GHSA-8q2w-wr49-whqj
—	github.com/traefik/traefik (Go)	up to 1.7.34	—	No fix listed	GHSA-8q2w-wr49-whqj
—	github.com/traefik/traefik/v2 (Go)	up to 2.11.40	—	No fix listed	GHSA-8q2w-wr49-whqj

traefik Vendortraefik Affected before 3.6.10 Fixed in 3.6.10 Patch available CNA
github.com/traefik/traefik/v3 (Go) Vendor— Affected before 3.6.10 Fixed in 3.6.10 Patch available GHSA-8q2w-wr49-whqj
github.com/traefik/traefik (Go) Vendor— Affected up to 1.7.34 Fixed in — No fix listed GHSA-8q2w-wr49-whqj
github.com/traefik/traefik/v2 (Go) Vendor— Affected up to 2.11.40 Fixed in — No fix listed GHSA-8q2w-wr49-whqj

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:traefik:traefik::::::::	before 3.6.10	Vulnerable	traefik

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* Versions before 3.6.10 Vulnerable ·traefik

Remediation

Fix · CNA traefik (traefik) Fixed in 3.6.10
Fix · GHSA-8q2w-wr49-whqj github.com/traefik/traefik/v3 (Go) Fixed in 3.6.10 Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat OpenShift Dev Spaces	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-29777
2026-10-03 Alias added: GHSA-8q2w-wr49-whqj

References

Advisory 2

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