{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.9.0"
                  },
                  {
                    "last_affected": "0.13.0-rc1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "1.0.0-rc1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "4b6dc6c722b20dc24cac70da52704b6027810e69"
            },
            {
              "last_affected": "bc195a14438f6607e266d8a12e529260272b060b"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "3d12061410a75212322bd51c7c91a56b7dfbcea6"
            }
          ],
          "repo": "https://github.com/eclipse-keypont/gose",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-h6w5-722x-2h3m"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "cwe_ids": [
      "CWE-354"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89320.json"
  },
  "details": "`HmacShaCryptor.Hash` never hashed its input. For any input it returned `HMAC_K(\"\")` — the MAC of the empty message under the key. Every AES-CBC-HMAC JWE produced or verified by gose therefore carried an authentication tag that is constant per key and independent of the message, removing ciphertext integrity entirely.",
  "id": "CVE-2026-89320",
  "modified": "2026-11-04T02:30:49.508798423Z",
  "published": "2026-10-23T08:56:20.140Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89320.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89320"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K(\"\") for all inputs, voiding CBC-HMAC JWE integrity"
}