CVE-2026-40040 Pachno 1.0.6 Unrestricted File Upload Remote Code Execution
Authenticated attackers can upload malicious PHP scripts to achieve remote code execution on the Pachno 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-2026-40040?
CVE-2026-40040 is a high-severity vulnerability in Pachno, published on 13 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Pachno 1.0.6 contains an unrestricted file upload vulnerability that allows authenticated users to upload arbitrary file types by bypassing ineffective extension filtering to the /uploadfile endpoint. Attackers can upload executable files .php5 scripts to web-accessible directories and execute them to achieve remote code execution on the server.
Weakness: CWE-434
Which versions are affected by CVE-2026-40040?
How do I fix CVE-2026-40040?
No fix has been published for CVE-2026-40040 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40040 being exploited?
There is no known exploitation of CVE-2026-40040 in the wild and no public exploit code.
Sources
Also known as GHSA-m96c-c5gp-88rx.