{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-65645", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-07-22T15:00:06.104Z", "datePublished": "2026-08-21T02:53:43.305Z", "dateUpdated": "2026-08-27T17:46:35.706Z"}, "containers": {"cna": {"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:'string'} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable"}], "affected": [{"defaultStatus": "unaffected", "vendor": "Rocket.Chat", "product": "Rocket.Chat", "versions": [{"version": "0", "status": "affected", "lessThan": "8.8.0", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.7.1", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.6.2", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.5.3", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.4.6", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.3.8", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.2.8", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "8.1.8", "versionType": "semver"}, {"version": "0", "status": "affected", "lessThan": "7.10.15", "versionType": "semver"}]}], "references": [{"url": "https://hackerone.com/reports/3852135"}, {"url": "https://github.com/RocketChat/Rocket.Chat/pull/41814"}], "credits": [{"lang": "en", "value": "Aang (iamaangx028)", "type": "finder"}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-08-21T02:53:43.305Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-20", "lang": "en", "description": "CWE-20 Improper Input Validation"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-27T17:46:23.910812Z", "id": "CVE-2026-65645", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-27T17:46:35.706Z"}}]}}

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{"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:'string'} 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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