CVE-2026-68560 Wekan:hell Injection in External Antivirus Scanner Path via asyncExec
Authenticated users can execute arbitrary commands on the server by injecting shell metacharacters into uploaded filenames when an external antivirus scanner is configured.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-68560?
CVE-2026-68560 is a high-severity command injection vulnerability in wekan, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Wekan is open source kanban built with Meteor. Prior to 9.75, models/fileValidation.js interpolated the uploaded fileObj.path into the administrator-configured externalCommandLine at its {file} placeholder and executed the result through asyncExec, which is promisify(exec) and invokes `/bin/sh -c`. On deployments with an external scanner configured, an authenticated user able to upload an attachment could place shell metacharacters such as command substitutions in the filename and execute commands as the Wekan server process. Version 9.75 adds shellQuote() and passes the file path as a POSIX single-quoted argument so shell metacharacters cannot escape the placeholder. This issue is fixed in version 9.75.
Weakness: CWE-78
Which versions are affected by CVE-2026-68560?
How do I fix CVE-2026-68560?
No fix has been published for CVE-2026-68560 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-68560 being exploited?
There is no known exploitation of CVE-2026-68560 in the wild and no public exploit code.
Sources
Also known as GHSA-x3xm-pxrv-jg7p.