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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👁 26 Views

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

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-56742
15 Jul 202619:14
–attackerkb
cgr
Chainguard
CVE-2026-56742 vulnerabilities
18 Jul 202620:25
–cgr
circl
Circl
CVE-2026-56742
25 Sep 202611:30
–circl
cve
CVE
CVE-2026-56742
15 Jul 202619:14
–cve
cvelist
Cvelist
CVE-2026-56742 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces
15 Jul 202619:14
–cvelist
euvd
EUVD
EUVD-2026-44773
24 Sep 202619:38
–euvd
mend
Mend
CVE-2026-56742
15 Jul 202619:14
–mend
nvd
NVD
CVE-2026-56742
15 Jul 202620:17
–nvd
osv-bit
osv-bit
BIT-CILIUM-2026-56742 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces
19 Jul 202623:37
–osv-bit
osv-bit
osv-bit
BIT-CILIUM-OPERATOR-2026-56742 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces
19 Jul 202623:37
–osv-bit
Rows per page
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
26