{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "8.7.1"
              },
              {
                "fixed": "8.6.2"
              },
              {
                "fixed": "8.5.3"
              },
              {
                "fixed": "8.4.6"
              },
              {
                "fixed": "8.3.8"
              },
              {
                "fixed": "8.2.8"
              },
              {
                "fixed": "8.1.8"
              },
              {
                "fixed": "7.10.15"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "dd2f20f9087383fdeb43590ecf4a01127b588e57"
            },
            {
              "fixed": "620394519991542b13db82e361dcb0c3e2014c1e"
            },
            {
              "fixed": "7e36cbd4c1aa29a691e3fec9827537430b2f346a"
            },
            {
              "fixed": "b7279c54f80a23e4499a69acee75af3ec647249b"
            },
            {
              "fixed": "7ce1a49d686463656a3993c9c536b03104527c39"
            },
            {
              "fixed": "16a2a0809c35a44233fce3c608e2e7878ebf03e2"
            },
            {
              "fixed": "687c4e27ea0e95e7631a64ce27e2debcd5d76c14"
            },
            {
              "fixed": "477ae4ae3928796b2c71c1db1a5ba2e848561300"
            }
          ],
          "repo": "https://github.com/rocketchat/rocket.chat",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "hackerone",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65645.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "8.8.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {\"$gt\": \"4\"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user.\nThe REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:'string'} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable",
  "id": "CVE-2026-65645",
  "modified": "2026-08-29T03:30:40.290894568Z",
  "published": "2026-08-21T02:53:43.305Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3852135"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65645.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65645"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RocketChat/Rocket.Chat/pull/41814"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}