How severe is CVE-2026-34212?

CVE-2026-34212 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-2026-34212 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34212?

CVE-2026-34212 affects Docmost. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34212?

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

Does CVE-2026-34212 have an EU (EUVD) identifier?

Yes. CVE-2026-34212 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22754.

When was CVE-2026-34212 published?

CVE-2026-34212 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-34212

CVE-2026-34212 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% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22754
Weakness: CWE-79
Affected product: Docmost
Published: 2026-04-14
Last modified: 2026-06-17

Description

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 patches the issue.

Frequently asked questions

What is CVE-2026-34212?: 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 patches the issue.
How severe is CVE-2026-34212?: CVE-2026-34212 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-2026-34212 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34212?: CVE-2026-34212 affects Docmost. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34212?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34212 have an EU (EUVD) identifier?: Yes. CVE-2026-34212 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22754.
When was CVE-2026-34212 published?: CVE-2026-34212 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://github.com/docmost/docmost/security/advisories/GHSA-cf68-cff9-hq4w

Affected products (1)

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

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