What is CVE-2026-40927?

CVE-2026-40927 is a medium-severity vulnerability in Docmost, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-21.

How severe is CVE-2026-40927?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Docmost

CVE-2026-40927

Docmost is open-source collaborative wiki and documentation software. Prior to 0.80.0, when leaving a comment on a page, it is possible to include a JavaScript URI as the link. When a user clicks on the link the JavaScript executes. This v…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.7th percentile) — read the EPSS interpretation.

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.

Affected products

Docmost — versions < 0.80.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/docmost/docmost/security/advisories/GHSA-4gv6-jw3v-wc34 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-40927?: CVE-2026-40927 is a medium-severity vulnerability in Docmost, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-21.
How severe is CVE-2026-40927?: Medium severity. CVSS v3 base score is 5.4 out of 10.