Quick answers
- Is CVE-2026-71802 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-71802 being exploited in the wild.
- How severe is CVE-2026-71802?
- Medium severity, with a CVSS score of 5.4, published 9 September 2026.
- Which products and versions are affected?
- REBUILD 4.4.3 and earlier.
- Is there a fix for CVE-2026-71802?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-71802 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-71802?
- Check whether you run REBUILD at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stored XSS vulnerability exists in the announcement preview component due to improper handling of HTML-escaped content. Although the server-side code correctly escapes announcement content using CommonsUtils.escapeHtml(), the frontend code reverses this escaping by using jQuery's html().text() method (via a $removeHtml function) and then injects the unescaped result into the DOM using React's dangerouslySetInnerHTML. An attacker with permission to create or modify announcements can craft payloads containing HTML/JavaScript that, after double-decoding, are executed in the browsers of all users viewing the affected announcement. The vulnerability affects REBUILD version 4.4.3 and potentially earlier versions. No patch information is currently available.
Affected products
- REBUILD REBUILD 4.4.3 and earlier
Timeline
- 2026-07-20: disclosed: Issue #6 reported on GitHub
- 2026-09-09: advisory: CVE-2026-71802 published on NVD