{"apiVersion":"1.0","identifier":"CVE-2026-65645","description":"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","publishedAt":"2026-08-21T04:18:14","lastModifiedAt":"2026-08-27T20:18:22","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-65645","cvssScore":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","epssProbability":0.00194,"riskScore":0.44,"affectedProduct":"Rocket.Chat","affectedVersions":"<8.8.0,<8.7.1,<8.6.2,<8.5.3,<8.4.6,<8.3.8,<8.2.8,<8.1.8,<7.10.15","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-65645","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-65645","en":"https://www.redsauce.net/en/cves/CVE-2026-65645","fr":"https://www.redsauce.net/fr/cves/CVE-2026-65645","pt":"https://www.redsauce.net/pt/cves/CVE-2026-65645","de":"https://www.redsauce.net/de/cves/CVE-2026-65645","sk":"https://www.redsauce.net/sk/cves/CVE-2026-65645","el":"https://www.redsauce.net/el/cves/CVE-2026-65645"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-65645"}}