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CVE-2026-112778

Traefik before 2.11.46, 3.6.17, and 3.7.1 Cross-Namespace Resource Reference via Kubernetes Annotations PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
traefik / traefikaffected 0 before 2.11.46; unaffected 2.11.46
traefik / traefikaffected 3.0.0 before 3.6.17; unaffected 3.6.17
traefik / traefikaffected 3.7.0 before 3.7.1; unaffected 3.7.1

CWE

CWE-862

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.