FKIE_CVE-2026-65645

Vulnerability from fkie_nvd - Published: 2026-08-21 04:18 - Updated: 2026-09-04 18:27
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
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. The 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
References
support@hackerone.comhttps://github.com/RocketChat/Rocket.Chat/pull/41814Patch, Vendor Advisory
support@hackerone.comhttps://hackerone.com/reports/3852135Third Party Advisory, Issue Tracking
Impacted products
Vendor Product Version
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat *
rocket.chat rocket.chat 8.7.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Rocket.Chat",
          "vendor": "Rocket.Chat",
          "versions": [
            {
              "lessThan": "8.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.7.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.6.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.4.6",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.3.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.2.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.1.8",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "7.10.15",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83AFD920-8EAC-445A-9EDE-39A405C7EFCF",
              "versionEndExcluding": "7.10.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F0047835-D014-4735-9D38-AD6E91E69DC2",
              "versionEndExcluding": "8.1.8",
              "versionStartIncluding": "8.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7BF9BDAA-1A56-43C5-ACFC-4849A21CD601",
              "versionEndExcluding": "8.2.8",
              "versionStartIncluding": "8.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "36B7912B-900A-4B96-BAE2-9CA5834BB25A",
              "versionEndExcluding": "8.3.8",
              "versionStartIncluding": "8.3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5314C8E0-FBBB-4DB6-9729-D6A41DEE57AF",
              "versionEndExcluding": "8.4.6",
              "versionStartIncluding": "8.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E8FA572-5D43-4253-A81E-F0F4FC3F3189",
              "versionEndExcluding": "8.5.3",
              "versionStartIncluding": "8.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "773C4B37-A14E-4898-8501-3F89C796CFC1",
              "versionEndExcluding": "8.6.2",
              "versionStartIncluding": "8.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:rocket.chat:rocket.chat:8.7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "89603D12-AAF4-4065-BDE9-45EB52E29EE0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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:\u0027string\u0027} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable"
    }
  ],
  "id": "CVE-2026-65645",
  "lastModified": "2026-09-04T18:27:21.523",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-65645",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-27T17:46:23.910812Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T04:18:14.690",
  "references": [
    {
      "source": "support@hackerone.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/RocketChat/Rocket.Chat/pull/41814"
    },
    {
      "source": "support@hackerone.com",
      "tags": [
        "Third Party Advisory",
        "Issue Tracking"
      ],
      "url": "https://hackerone.com/reports/3852135"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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