How severe is CVE-2026-40927?

CVE-2026-40927 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40927 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40927?

CVE-2026-40927 affects Docmost. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40927?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40927 have an EU (EUVD) identifier?

Yes. CVE-2026-40927 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24487.

When was CVE-2026-40927 published?

CVE-2026-40927 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-40927

CVE-2026-40927 is a medium-severity vulnerability in Docmost with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24487
Weakness: CWE-79
Affected product: Docmost
Published: 2026-04-21
Last modified: 2026-06-17

Description

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 vulnerability is fixed in 0.80.0.

Frequently asked questions

What is 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 vulnerability is fixed in 0.80.0.
How severe is CVE-2026-40927?: CVE-2026-40927 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40927 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40927?: CVE-2026-40927 affects Docmost. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40927?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40927 have an EU (EUVD) identifier?: Yes. CVE-2026-40927 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24487.
When was CVE-2026-40927 published?: CVE-2026-40927 was published on 2026-04-21 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:*

More vulnerabilities in Docmost

CVE-2026-24045 — High (CVSS 7.3): Docmost is open-source collaborative wiki and documentation software. From 0.20.0 and before 0.25.0, the public share…
CVE-2026-22249 — High (CVSS 7.1): Docmost is an open-source collaborative wiki and documentation software. From 0.21.0 to before 0.24.0, Docmost is…
CVE-2025-55574 — Medium (CVSS 6.1): Cross Site Scripting vulnerability in docmost v.0.21.0 and before allows an attacker to execute arbitrary code
CVE-2026-34213 — Medium (CVSS 5.4): Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version…
CVE-2026-34212 — Medium (CVSS 5.4): Docmost is open-source collaborative wiki and documentation software. In versions prior to 0.71.0, improper…
CVE-2026-23630 — Medium (CVSS 5.4): Docmost is open-source collaborative wiki and documentation software. In versions 0.3.0 through 0.23.2, Mermaid code…

All CVEs affecting Docmost →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →