Unrated severityNVD Advisory· Published Jul 15, 2026· Updated Jul 16, 2026
Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces
CVE-2026-56742
Description
Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5.
Affected products
19- osv-coords18 versionspkg:apk/chainguard/hubblepkg:apk/chainguard/hubble-fipspkg:apk/chainguard/hubble-ui-backendpkg:apk/chainguard/hubble-ui-backend-fipspkg:apk/chainguard/kubescapepkg:apk/chainguard/kubescape-operatorpkg:apk/chainguard/kubescape-operator-fipspkg:apk/chainguard/kubescape-serverpkg:apk/chainguard/kubescape-server-downloaderpkg:apk/chainguard/kubescape-server-fipspkg:apk/chainguard/kubescape-server-fips-downloaderpkg:apk/wolfi/hubblepkg:apk/wolfi/hubble-ui-backendpkg:apk/wolfi/kubescapepkg:apk/wolfi/kubescape-operatorpkg:bitnami/ciliumpkg:bitnami/cilium-operatorpkg:bitnami/hubble-relay
< 1.19.4-r6+ 17 more
- (no CPE)range: < 1.19.4-r6
- (no CPE)range: < 1.19.4-r6
- (no CPE)range: < 0.13.5-r11
- (no CPE)range: < 0.13.5-r11
- (no CPE)range: < 4.0.10-r8
- (no CPE)range: < 0.2.151-r7
- (no CPE)range: < 0.2.151-r9
- (no CPE)range: < 4.0.10-r8
- (no CPE)range: < 4.0.10-r8
- (no CPE)range: < 4.0.10-r9
- (no CPE)range: < 4.0.10-r9
- (no CPE)range: < 1.19.4-r6
- (no CPE)range: < 0.13.5-r11
- (no CPE)range: < 4.0.10-r8
- (no CPE)range: < 0.2.151-r7
- (no CPE)range: < 1.17.17
- (no CPE)range: < 1.17.17
- (no CPE)range: < 1.17.17
Patches
Vulnerability mechanics
References
8- github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333debmitrex_refsource_MISC
- github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857mitrex_refsource_MISC
- github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032bmitrex_refsource_MISC
- github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512camitrex_refsource_MISC
- github.com/cilium/cilium/releases/tag/v1.17.17mitrex_refsource_MISC
- github.com/cilium/cilium/releases/tag/v1.18.11mitrex_refsource_MISC
- github.com/cilium/cilium/releases/tag/v1.19.5mitrex_refsource_MISC
- github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmjmitrex_refsource_CONFIRM
News mentions
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