What is CVE-2026-22560?

CVE-2026-22560 is a medium-severity vulnerability in Rocket.chat, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.3/10. Published 2026-04-10.

How severe is CVE-2026-22560?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Open Redirect in Rocket.chat

CVE-2026-22560

An open redirect vulnerability in Rocket.Chat versions prior to 8.4.0 allows users to be redirected to arbitrary URLs by manipulating parameters within a SAML endpoint.

Vulnerability class: Open Redirect

Published 2026-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (22.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Rocket.chat — versions 8.4.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

hackerone.com/reports/3418031 (Issue Tracking)
github.com/RocketChat/Rocket.Chat/pull/38994 (Issue Tracking)

Frequently asked questions

What is CVE-2026-22560?: CVE-2026-22560 is a medium-severity vulnerability in Rocket.chat, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.3/10. Published 2026-04-10.
How severe is CVE-2026-22560?: Medium severity. CVSS v3 base score is 5.3 out of 10.