What is CVE-2026-52891?

CVE-2026-52891 is a critical-severity vulnerability in Wekan, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-07-15.

How severe is CVE-2026-52891?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Wekan

CVE-2026-52891

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/fi…

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Wekan — versions < 9.07

Weakness classification (CWE)

CWE-78 — OS Command Injection
CWE-88 — Argument Injection

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-52891?: CVE-2026-52891 is a critical-severity vulnerability in Wekan, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-07-15.
How severe is CVE-2026-52891?: Critical severity. CVSS v3 base score is 9.9 out of 10.