HighFix available

Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces

Type: advisorySource: OSV1 source record

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.

Announced 19 Jul 2026Group revision 1

Original source ↗

BIT-cilium-operator-2026-56742

Primary source · Revision 2

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-cilium-operator-2026-56742

cilium-operator

Source reference: /affected/0/package/name

Affected versions: Not stated in this record
Fixed versions: 1.17.17
Source reference: /affected/0/ranges
1.18.11
Source reference: /affected/0/ranges
1.19.5
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.17.17"
          },
          {
            "introduced": "1.18.0"
          },
          {
            "fixed": "1.18.11"
          },
          {
            "introduced": "1.19.0"
          },
          {
            "fixed": "1.19.5"
          }
        ]
      }
    ],
    "package": {
      "name": "cilium-operator",
      "purl": "pkg:bitnami/cilium-operator",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V3",
        "score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/cilium-operator/BIT-cilium-operator-2026-56742.json"
    }
  }
]

Related CVEs: CVE-2026-56742
Source reference: /aliases

Publisher severity

high

Source reference: /database_specific/severity

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-56742 · High

cilium