CVE-2026-4999 z-9527 admin isImg Check upload.js uploadFile path traversal
Attackers can exploit a path traversal vulnerability in the file upload function to read or modify arbitrary files on the server.
- 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-2026-4999?
CVE-2026-4999 is a medium-severity path traversal vulnerability in z-9527 admin, published on 28 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in z-9527 admin up to 72aaf2dd05cf4ec2e98f390668b41e128eec5ad2. This issue affects the function uploadFile of the file /server/utils/upload.js of the component isImg Check. The manipulation of the argument fileType leads to path traversal. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-22
Which versions are affected by CVE-2026-4999?
How do I fix CVE-2026-4999?
No fix has been published for CVE-2026-4999 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-4999 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4999 exists.
Sources
Also known as GHSA-m9h2-7m7g-5fg4.