What is CVE-2026-55762?

CVE-2026-55762 is a high-severity vulnerability in Rocketchat Rocket.chat, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-06-24.

How severe is CVE-2026-55762?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Rocketchat Rocket.chat

CVE-2026-55762

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, the POST /api/v1/fingerprint REST endpoint enforces authentication (authRequired: true) but…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Rocketchat Rocket.chat — versions >= 8.5.0-rc.0, < 8.5.1, >= 8.4.0-rc.0, < 8.4.4, >= 8.3.0-rc.0, < 8.3.6

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-55762?: CVE-2026-55762 is a high-severity vulnerability in Rocketchat Rocket.chat, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-06-24.
How severe is CVE-2026-55762?: High severity. CVSS v3 base score is 8.1 out of 10.