Critical 9.9Published Jul 15, 2026

CVE-2026-52891Wekan: Shell Injection via Avatar Upload

Updated under an hour ago (Oct 26, 2026, 6:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for wekan

Exploited in the last 30 days

Wekan is open source kanban built with Meteor. Prior to 9.07, Wekan avatar upload functionality embeds user-supplied filenames into paths later passed to child_process.exec() for MIME-type detection. Because models/avatars.js and models/fileValidation.js used a shell command with the avatar filename, shell metacharacters such as backticks and $() in the filename could execute commands on the server. This issue is fixed in version 9.07.

CVSS: 9.9 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-78, CWE-88
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

wekan wekan wekan:wekan (from the name)	before 9.07	CNA record

References

https://github.com/wekan/wekan/security/advisories/GHSA-35j7-h385-2q9gx-refsource-confirm
https://github.com/wekan/wekan/commit/a4c74a5980e9f778eb444fd346f32aa3d16786a9x-refsource-misc
https://github.com/wekan/wekan/releases/tag/v9.07x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.