{"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":"2026-08-21T02:53:43.305Z"},"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"}}}}