CVE-2026-65645 - Rocket.Chat Insecure DDP Method Schema Validation Information Disclosure

CVE-2026-65645 - Rocket.Chat Insecure DDP Method Schema Validation Information Disclosure

https://cvefeed.io/rssfeed/latest.atom / Fri, 08/21/2026 - 07:27
CVE ID :CVE-2026-65645
Published : Aug. 21, 2026, 2:53 a.m. | 1 hour, 8 minutes ago
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
Severity: 0.0 | NA
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