Medium severity5.9NVD Advisory· Published Jul 15, 2026· Updated Jul 17, 2026
CVE-2026-56742
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
20- 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/7422068aff67ac77c7dcc57aa5b9240c91333debnvdPatch
- github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857nvdPatch
- github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032bnvdPatch
- github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512canvdPatch
- github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmjnvdVendor Advisory
- github.com/cilium/cilium/releases/tag/v1.17.17nvdRelease Notes
- github.com/cilium/cilium/releases/tag/v1.18.11nvdRelease Notes
- github.com/cilium/cilium/releases/tag/v1.19.5nvdRelease Notes
News mentions
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