CVE-2026-34212: Docmost is open-source collaborative wiki and documentation software

Q: How do I fix CVE-2026-34212?

docmost: upgrade to 0.71.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-34212 being exploited?

CVE-2026-34212 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-2026-34212 affect?

CVE-2026-34212 affects docmost. Severity is medium (CVSS 5.4). Docmost is open-source collaborative wiki and documentation software. In versions prior to 0.71.0, improper neutralization of attachment URLs in Docmost allows a low-privileged authenticated user to store a malicious `javascript:` URL insid

Q: How urgent is CVE-2026-34212?

Priority 27/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2026-34212 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. In versions prior to 0.71.0, improper neutralization of attachment URLs in Docmost allows a low-privileged authenticated user to store a malicious `javascript:` URL inside an attachment node in page content. When another user views the page and activates the attachment link/icon, attacker-controlled JavaScript executes in the context of the Docmost origin. Version 0.71.0 patche

Why this priority

Public exploit reference

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	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-14
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 22:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

docmost docmost UPGRADE

Affected: < 0.71.0

Fixed in: 0.71.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.71.0 (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-2026-34212?

docmost: upgrade to 0.71.0. Exact commands for each OS are on this page.

Is CVE-2026-34212 being exploited?

CVE-2026-34212 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-2026-34212 affect?

CVE-2026-34212 affects docmost. Severity is medium (CVSS 5.4). Docmost is open-source collaborative wiki and documentation software. In versions prior to 0.71.0, improper neutralization of attachment URLs in Docmost allows a low-privileged authenticated user to store a malicious `javascript:` URL insid

How urgent is CVE-2026-34212?

Priority 27/100. Public exploit reference

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-2026-34213 MEDIUM 5.4 UPGRADE Docmost is open-source collaborative wiki and documentation software
CVE-2026-40927 MEDIUM 5.4 UPGRADE Docmost is open-source collaborative wiki and documentation software

References

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