Log in Start free

Vulnerability · Published Jun 24, 2026 · Assigned by GitHub_M

CVE-2026-45687Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage

High 8.5

In plain English

A high-severity security flaw in Rocket.Chat from RocketChat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.3%top 72.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected products (as reported)

VendorProductVersions
RocketChat Rocket.Chat >= 8.5.0-rc.0, < 8.5.0>= 8.4.0-rc.0, < 8.4.1>= 8.3.0-rc.0, < 8.3.3>= 8.2.0-rc.0, < 8.2.3>= 8.1.0-rc.0, < 8.1.4>= 8.0.0-rc.0, < 8.0.5>= 7.11.0-rc.0, < 7.13.7< 7.10.11

Weakness: CWE-915 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References