CVE-2026-45687: Rocketchat Rocket.chat

High severity, CVSS 8.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's sendFileMessage DDP method passes the entire attacker-supplied file object into Uploads.updateFileComplete, which merges it directly into a MongoDB $set update via Object.assign. There is no allow-list of writable fields. An attacker can therefore rewrite any column on their own upload record, notably store and the store-specific path fields. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.

Affected products

• Rocketchat Rocket.chat: from 8.5.0-rc.0, before 8.5.0 (fixed in 8.5.0); from 8.4.0-rc.0, before 8.4.1 (fixed in 8.4.1); from 8.3.0-rc.0, before 8.3.3 (fixed in 8.3.3); from 8.2.0-rc.0, before 8.2.3 (fixed in 8.2.3); from 8.1.0-rc.0, before 8.1.4 (fixed in 8.1.4); from 8.0.0-rc.0, before 8.0.5 (fixed in 8.0.5); …

Published 2026-06-24. Last modified 2026-06-26.