CVE-2026-45687 Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage
Authenticated attackers can steal arbitrary data or modify records by exploiting mass assignment in the sendFileMessage method.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45687?
CVE-2026-45687 is a high-severity vulnerability in RocketChat Rocket.Chat, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-915
Which versions are affected by CVE-2026-45687?
How do I fix CVE-2026-45687?
No fix has been published for CVE-2026-45687 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-45687 being exploited?
There is no known exploitation of CVE-2026-45687 in the wild and no public exploit code.
Sources
Also known as GHSA-fhc2-x8cp-c5ch.