What is CVE-2026-45687?

CVE-2026-45687 is a high-severity vulnerability in Rocketchat Rocket.chat, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 8.5/10. Published 2026-06-24.

How severe is CVE-2026-45687?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in Rocketchat Rocket.chat

CVE-2026-45687

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 ob…

Vulnerability class: Mass Assignment

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Rocketchat Rocket.chat — versions >= 8.5.0-rc.0, < 8.5.0, >= 8.4.0-rc.0, < 8.4.1, >= 8.3.0-rc.0, < 8.3.3

Weakness classification (CWE)

CWE-915 — Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45687?: CVE-2026-45687 is a high-severity vulnerability in Rocketchat Rocket.chat, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 8.5/10. Published 2026-06-24.
How severe is CVE-2026-45687?: High severity. CVSS v3 base score is 8.5 out of 10.