CVE-2026-40927: Docmost is open-source collaborative wiki and documentation software

Q: How do I fix CVE-2026-40927?

docmost: upgrade to 0.80.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40927 being exploited?

CVE-2026-40927 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40927 affect?

CVE-2026-40927 affects docmost. Severity is medium (CVSS 5.4). 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 vu

Q: How urgent is CVE-2026-40927?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2026-40927 is a medium-severity flaw (CVSS 5.4) affecting docmost. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: docmost

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 21:16 UTCPublished CVE record published
2026-06-17 10:45 UTCUpdated Record last modified

docmost docmost UPGRADE

Affected: < 0.80.0

Fixed in: 0.80.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy docmost || rpm -q docmost || docmost --version

2. UPGRADE to 0.80.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade docmost

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade docmost

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40927?

docmost: upgrade to 0.80.0. Exact commands for each OS are on this page.

Is CVE-2026-40927 being exploited?

CVE-2026-40927 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40927 affect?

CVE-2026-40927 affects docmost. Severity is medium (CVSS 5.4). 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 vu

How urgent is CVE-2026-40927?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2026-33146 MEDIUM 4.3 UPGRADE Docmost is open-source collaborative wiki and documentation software
CVE-2026-33193 MEDIUM 4.6 UPGRADE Docmost is open-source collaborative wiki and documentation software
CVE-2026-34212 MEDIUM 5.4 UPGRADE Docmost is open-source collaborative wiki and documentation software
CVE-2026-34213 MEDIUM 5.4 UPGRADE Docmost is open-source collaborative wiki and documentation software

References

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