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CVE-2026-112778

6.4 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. Cpes+2 CPE criteria (now 2)NVD modified 2026-10-23 17:04
  2. StatusPublished → AnalyzedNVD modified 2026-10-23 17:04
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 21:16
  4. StatusReceived → Awaiting AnalysisNVD modified 2026-10-19 21:13
  5. First seenCVSS 6.4NVD modified 2026-10-19 20:17

Affected (CPE criteria) 2

  • cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
  • cpe:2.3:a:traefik:traefik:3.7.0:*:*:*:*:*:*:*

References 2