CVE-2026-49445: Github.com/cilium/cilium Cilium Vulnerable To Sensitive Information Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3fcv-jvfp-m4q9",
  "modified" : "2026-07-06T17:03:20Z",
  "published" : "2026-07-06T17:03:20Z",
  "aliases" : [ "CVE-2026-49445" ],
  "summary" : "Cilium vulnerable to sensitive information disclosure and cluster disruption via local Envoy admin socket access",
  "details" : "### Impact\n\nWhen Cilium L7 functionality is enabled on a cluster, the Envoy instance supporting this functionality creates a world-accessible socket on cluster nodes. A local attacker would be able to access Envoy admin endpoints. Depending on deployment configuration, this can expose sensitive information or allow disruptive administrative operations, such as:\n\n- Exposing TLS secrets\n- Disrupting traffic in the cluster\n- Terminating the Envoy process  \n\nThis issue affects both the embedded and standalone Envoy deployment models.\n\n### Patches\n\nThis issue affects:\n\n- Cilium v1.19 between v1.19.0 and v1.19.1 inclusive\n- Cilium v1.18 between v1.18.0 and v1.18.7 inclusive\n- All versions of Cilium prior to v1.17.14\n\nThis issue has been patched in https://github.com/cilium/cilium/pull/44512, included in:\n\n- Cilium v1.19.2\n- Cilium v1.18.8\n- Cilium v1.17.14\n\n### Workarounds\n\nThere is no known workaround to this issue.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to [moemen](https://github.com/moemen) for reporting the issue and [0xch4z](https://github.com/0xch4z) for their work on triaging and remediating this issue.\n\n### For more information\n\nIf there are any questions or comments about this advisory, please reach out on [Slack (https://docs.cilium.io/en/latest/community/community/).\n\nIf anyone thinks they have found a vulnerability affecting Cilium, it is strongly encouraged to report it to the security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and the report will be treated as a top priority.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.19.0"
      }, {
        "fixed" : "1.19.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.18.0"
      }, {
        "fixed" : "1.18.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.17.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/security/advisories/GHSA-3fcv-jvfp-m4q9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/pull/44512"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cilium/cilium"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-06T17:03:20Z",
    "nvd_published_at" : null
  }
}