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Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces

🗓️ 24 Sep 2026 19:38:39Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 6 Views

Cilium users with HTTPRoute permissions can mirror traffic to any namespace, bypassing ReferenceGrant.

Related
Detection
Refs
Vulners
Node
OR
ciliumciliumRange1.19.0–1.19.5go
ciliumciliumciliumRange1.18.0–1.18.11go
ciliumciliumRange<1.17.17go

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24 Sep 2026 19:38Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.9 - 8.9
EPSS0.00172
SSVC
6