{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.63.0"
              },
              {
                "fixed": "1.63.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "17ad0c69b418f58214266ab116b6998e9b1b783e"
            }
          ],
          "repo": "https://github.com/mastra-ai/mastra",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82273.json"
  },
  "details": "Mastra through 1.63.0 contains an authentication bypass vulnerability in the memory API thread ownership validation when mapUserToResourceId callback is omitted from configuration. Authenticated attackers can enumerate all threads via GET /api/memory/threads and read conversation history and metadata of other resource owners.",
  "id": "CVE-2026-82273",
  "modified": "2026-08-30T03:30:54.235322627Z",
  "published": "2026-08-28T16:18:55.518Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82273.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82273"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/mastra-memory-api-thread-ownership-check-is-a-no-op-when-mapusertoresourceid-is-unset"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mastra-ai/mastra/issues/18911"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mastra-ai/mastra"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/mastra-ai/mastra/blob/b7e66f0c478a227985e0062794ef058c3714fabf/packages/server/src/server/handlers/utils.ts"
    }
  ],
  "schema_version": "1.9.0",
  "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Mastra Memory API Thread Ownership Check Is a No-op When mapUserToResourceId Is Unset"
}