CVE-2026-112778
Traefik: missing authorisation
- Risk score
- 65/100
- CVSS
- 8.8 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 19 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Traefik before 2.11.46, 3.x before 3.6.17, and 3.7.0 lack namespace validation for Ingress and Service annotations in the Kubernetes Ingress provider, allowing references to Middlewares, ServersTransports, and TLSOptions in other namespaces. Attackers able to create or update Ingress or Service resources in one namesp…
- Affected
- traefik
- Fix
- Upgrade Traefik to 2.11.46, 3.6.17 or 3.7.0 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.8 high
- On your watchlist: kubernetes
References
Original description
Traefik before 2.11.46, 3.x before 3.6.17, and 3.7.0 lack namespace validation for Ingress and Service annotations in the Kubernetes Ingress provider, allowing references to Middlewares, ServersTransports, and TLSOptions in other namespaces. Attackers able to create or update Ingress or Service resources in one namespace can set router.middlewares or service.serverstransport annotations to obtain another tenant's injected credentials or reuse its client certificates, bypassing namespace-based tenant isolation.
Last activity 19 Oct 2026. Patch Forecast updates every hour.