Vulnerability from bitnami_vulndb
Published
2026-08-18 10:03
Modified
2026-08-18 10:32
Summary
etcd: Watch API authorization bypass via open-ended range requests
Details

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "etcd",
        "purl": "pkg:bitnami/etcd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.33"
            },
            {
              "introduced": "3.6.0"
            },
            {
              "fixed": "3.6.14"
            },
            {
              "introduced": "3.7.0"
            },
            {
              "fixed": "3.7.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-73499"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:etcd:etcd:*:*:*:*:*:go:*:*"
    ],
    "severity": "High"
  },
  "details": "etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.",
  "id": "BIT-etcd-2026-73499",
  "modified": "2026-08-18T10:32:25.960Z",
  "published": "2026-08-18T10:03:47.354Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41ed"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eae"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.5.33"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.6.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/releases/tag/v3.7.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73499"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "etcd: Watch API authorization bypass via open-ended range requests"
}



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