Improper Verification of Cryptographic Signature in Elastic Package Registry Leading to Package Integrity Bypass

{
  "id": "d7b31dadfa1e93600159515c21268560b3b2c30ba8cdb02b8179067dd4d1cd99",
  "url": "https://osv.dev/vulnerability/CVE-2026-33467",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Improper Verification of Cryptographic Signature in Elastic Package Registry Leading to Package Integrity Bypass",
    "summary": "Improper Verification of Cryptographic Signature (CWE-347) in Elastic Package Registry could allow an attacker positioned to intercept network traffic, or to otherwise influence the contents served to a self-hosted registry, to substitute a tampered package without the integrity check failing closed.",
    "evidence": "osv:CVE-2026-33467",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-33467",
      "aliases": [
        "CVE-2026-33467",
        "GHSA-r727-5pf6-47r2",
        "GO-2026-5611"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/elastic/package-registry",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "662a9d5a9ea1102e30de6a549b2bee14b5a1a189"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:elastic:elastic_package_registry:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.38.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.37.0",
            "v1.36.0",
            "v1.35.0",
            "v1.34.0",
            "v1.33.0",
            "v1.32.1",
            "v1.32.0",
            "v1.31.1",
            "v1.31.0",
            "v1.30.1",
            "v1.30.0",
            "v1.29.0",
            "v1.28.0",
            "v1.27.0",
            "v1.26.0",
            "v1.25.0",
            "v1.24.1",
            "v1.24.0",
            "v1.23.1",
            "v1.23.0",
            "v1.22.0",
            "v1.21.0",
            "v1.20.0",
            "v1.19.0",
            "v1.18.0",
            "v1.17.0",
            "v1.16.3",
            "v1.16.2",
            "v1.16.1",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.1",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.0",
            "v1.5.1",
            "v1.5.0",
            "v1.4.1",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v0.21.0",
            "v0.20.0",
            "v0.19.0",
            "v0.18.0",
            "v0.17.0",
            "v0.16.0",
            "v0.15.0",
            "v0.14.0",
            "v0.13.0",
            "v0.12.1",
            "v0.12.0",
            "v0.11.0",
            "v0.10.0",
            "v0.9.0",
            "v0.8.0",
            "v0.7.1",
            "v0.7.0",
            "v0.6.0",
            "v0.4.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33467.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.196360895Z",
      "provider": "osv",
      "references": [
        "https://discuss.elastic.co/t/elastic-package-registry-1-38-0-security-update-esa-2026-27/386081",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33467.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33467"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-347"
        ],
        "cna_assigner": "elastic",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.1.0"
                  },
                  {
                    "last_affected": "1.37.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33467.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-33467",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504495,
  "published_at": "2026-04-28T21:15:24.551+00:00"
}