XSS in Nocobase
CVE-2026-84701
NocoBase fails to sanitize rich text field values in the read renderer, allowing users with create permissions to store malicious HTML with event handlers. Attackers can write arbitrary markup through the collection API that executes in the browsers of all users viewing the affected record.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/nocobase/nocobase (product)
- github.com/nocobase/nocobase/blob/v2.2.5/packages/core/client/src/schema-compon… (technical-description)
- github.com/nocobase/nocobase/issues/10416 (issue-tracking)
- www.vulncheck.com/advisories/nocobase-rich-text-field-stored-cross-site-scripti… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84701?
- CVE-2026-84701 is a medium-severity vulnerability in Nocobase, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-09-02.
- How severe is CVE-2026-84701?
- Medium severity. CVSS v3 base score is 5.4 out of 10.