CVE-2026-112778Medium· 6.4▾ SunlitTraefik 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 namespa…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.2 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
0.2% → 0.2%
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.
traefik < 2.11.46traefik >= 3.0.0 < 3.6.17traefik >= 3.7.0 < 3.7.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-114639High· 8.7Traefik before 2.11.58 and 3.7.14 Authentication Bypass via Negotiate Connection Pool
CVE-2026-114635High· 8.7Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme
CVE-2026-114636High· 8.7Traefik v3.7.13 Authentication Bypass via ssl-passthrough Ingress HTTP Router
CVE-2026-114640High· 8.7Traefik v3.7.0 before v3.7.14 mTLS Header Spoofing via Ingress-NGINX HTTP Router
CVE-2026-114638High· 8.7Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision
CVE-2026-114656High· 7.5Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher