What is CVE-2026-5808?

CVE-2026-5808 is a medium-severity vulnerability in Openstatushq Openstatus, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-04-08.

How severe is CVE-2026-5808?

Medium severity. CVSS v3 base score is 4.3 out of 10.

RCE in Openstatushq Openstatus

CVE-2026-5808

A vulnerability was detected in openstatusHQ openstatus up to 1b678e71a85961ae319cbb214a8eae634059330c. This impacts an unknown function of the file apps/dashboard/src/app/(dashboard)/onboarding/client.tsx of the component Onboarding Endpoint. The manipulation of the argument callbackURL results in cross site scripting. The attack may be launched remotely. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. The patch is identified as 43d9b2b9ef8ae1a98f9bdc8a9f86d6a3dfaa2dfb. It is advisable to implement a patch to correct this issue. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-04-08 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (39.7th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% 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: 0.005 · change: +0.002

Affected products

Openstatushq Openstatus — versions 1b678e71a85961ae319cbb214a8eae634059330c

Weakness classification (CWE)

References

vuldb.com/vuln/356245 (technical-description, vdb-entry)
vuldb.com/vuln/356245/cti (signature, permissions-required)
vuldb.com/submit/787321 (third-party-advisory)
gist.github.com/TrebledJ/ab83abb1ca7ff6c1f39e16a37020f323 (related)
github.com/openstatusHQ/openstatus/pull/1981 (issue-tracking, patch)
github.com/openstatusHQ/openstatus/commit/43d9b2b9ef8ae1a98f9bdc8a9f86d6a3dfaa2… (patch)
github.com/openstatusHQ/openstatus/ (product)

Frequently asked questions

What is CVE-2026-5808?: CVE-2026-5808 is a medium-severity vulnerability in Openstatushq Openstatus, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-04-08.
How severe is CVE-2026-5808?: Medium severity. CVSS v3 base score is 4.3 out of 10.