{"id":"CVE-2026-65645","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","modified":"2026-08-29T03:30:40.290894568Z","published":"2026-08-21T02:53:43.305Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"fixed":"8.8.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"hackerone","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65645.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rocketchat/rocket.chat","events":[{"introduced":"0"},{"fixed":"dd2f20f9087383fdeb43590ecf4a01127b588e57"},{"fixed":"620394519991542b13db82e361dcb0c3e2014c1e"},{"fixed":"7e36cbd4c1aa29a691e3fec9827537430b2f346a"},{"fixed":"b7279c54f80a23e4499a69acee75af3ec647249b"},{"fixed":"7ce1a49d686463656a3993c9c536b03104527c39"},{"fixed":"16a2a0809c35a44233fce3c608e2e7878ebf03e2"},{"fixed":"687c4e27ea0e95e7631a64ce27e2debcd5d76c14"},{"fixed":"477ae4ae3928796b2c71c1db1a5ba2e848561300"}],"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"}}],"versions":["7.10.14","8.2.7","8.1.7","8.3.7","8.4.5","8.5.2","8.6.1","8.7.0","7.10.13","8.1.6","8.2.6","8.3.6","8.4.4","8.5.1","8.6.0","7.10.12","8.1.5","8.3.5","8.2.5","8.4.3","8.5.0","8.2.4","8.3.4","8.4.2","7.10.11","8.1.4","8.2.3","8.3.3","8.4.1","7.10.10","8.2.2","8.1.3","8.3.2","8.4.0","7.10.9","8.1.2","8.2.1","8.3.1","8.3.0","7.10.8","8.1.1","8.2.0","7.10.7","8.1.0","8.0.1","8.0.0","7.13.2","7.10.6","7.10.5","7.12.2","7.13.1","7.13.0","7.10.4","7.12.1","7.11.0","7.12.0","7.10.3","7.10.2","7.10.1","7.10.0","7.9.3","7.9.1","7.8.3","7.9.0","7.8.2","7.8.1","7.8.0","7.8.0-rc.1","7.8.0-rc.0","6.0.0","5.4.4","5.4.3","5.4.2","5.4.1","5.3.5","5.4.0","5.3.4","5.3.2","5.1.4","5.2.0","5.3.1","5.3.0","5.1.3","5.1.1","5.0.5","5.1.0","5.0.4","5.0.3","5.0.2","5.0.1","5.0.0","4.8.2","4.8.0","4.6.3","4.7.3","4.7.2","4.4.4","4.7.1","4.7.0","4.6.2","4.6.1","4.5.5","4.6.0","4.4.2","4.5.4","4.5.3","4.5.2","4.5.1","4.5.0","4.4.1","4.4.0","4.3.3","4.3.2","4.3.1","4.2.2","4.1.2","4.3.0","4.2.1","4.2.0","4.1.1","4.1.0","4.0.5","3.18.2","4.0.4","4.0.3","4.0.2","4.0.1","4.0.0","3.18.1","3.17.2","3.16.4","3.18.0","3.17.1","3.17.0","3.16.3","3.16.1","3.16.2","3.16.0","3.15.2","3.14.4","3.15.1","3.15.0","3.14.3","3.14.2","3.14.1","3.13.3","3.14.0","3.13.2","3.13.1","3.12.3","3.13.0","3.12.2","3.12.1","3.12.0","3.11.1","3.10.5","3.11.0","3.10.4","3.10.3","3.10.2","3.10.1","3.10.0","3.9.3","3.9.2","3.9.1","3.9.0","3.8.2","3.7.2","0.74.3","3.8.1","3.8.0","3.7.1","3.7.0","3.6.3","3.6.2","3.6.1","3.6.0","3.5.4","3.5.3","3.5.2","3.5.1","3.5.0","3.4.2","3.4.1","3.4.0","3.3.3","3.3.2","3.3.1","3.3.0","3.2.2","3.2.1","3.1.2","3.0.12","3.2.0","3.1.1","3.1.0","3.0.11","3.0.10","3.0.9","3.0.8","3.0.7","3.0.6","3.0.5","3.0.4","3.0.3","3.0.2","3.0.1","2.4.9","3.0.0","2.4.8","2.4.7","2.4.6","2.4.5","2.4.4","2.4.3","2.4.2","2.4.1","2.4.0","2.3.2","2.3.1","2.3.0","2.2.0","2.1.2","2.0.0","1.3.2","2.1.1","2.1.0","1.3.1","1.3.0","1.2.1","1.0.3","1.1.3","1.2.0","1.1.2","1.1.1","1.1.0","1.0.2","1.0.1","1.0.0","0.74.2","0.74.1","0.74.0","0.73.2","0.73.1","0.73.0","0.72.3","0.72.2","0.72.1","0.70.4","0.71.1","0.72.0","0.71.0","0.70.3","0.70.2","0.70.1","0.70.0","0.69.2","0.69.1","0.69.0","0.68.5","0.68.4","0.68.3","0.68.2","0.68.1","0.68.0","0.67.0","0.66.3","0.66.2","0.66.1","0.66.0","0.65.2","0.65.1","0.65.0","0.64.2","0.64.1","0.64.0","0.63.3","0.63.2","0.63.1","0.63.0","0.62.2","0.62.1","0.62.0","0.61.2","0.61.1","0.61.0","0.60.4","0.60.3","0.60.2","0.60.1","0.60.0","0.59.6","0.59.5","0.59.4","0.59.3","0.59.2","0.59.1","0.59.0","0.58.2","0.58.1","0.58.0","0.57.2","0.57.1","0.57.0","0.56.0","0.56.0-rc.7","0.56.0-rc.6","0.56.0-rc.5","0.56.0-rc.4","0.56.0-rc.3","0.56.0-rc.2","0.56.0-rc.1","0.56.0-rc.0","0.54.1","0.54.0","0.50.0","0.49.4","0.49.3","0.49.2","0.49.1","0.49.0","0.48.0","0.46.0","0.45.0","0.44.0","0.43.0","0.42.0","0.41.0","0.40.1","0.40.0","0.39.0","0.38.0","0.37.1","0.37.0","0.36.0","0.30.0","0.29.0","0.28.0","0.27.0","0.26.0","0.25.0","0.24.0","0.23.0","0.19.0","0.18.0","0.17.0","0.16.0","0.15.0","0.14.0","0.13.0","0.11.0","0.10.2","0.10.1","0.10.0","0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65645.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}