CVE-2026-42322 Piwigo: Authenticated RCE via File Upload in Logo Upload Feature
An authenticated administrator can upload malicious files with executable extensions to achieve remote code execution in Piwigo.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42322?
CVE-2026-42322 is a critical vulnerability in Piwigo, published on 25 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, admin/themes_standard_pages.php validates uploaded logo content by MIME type but reuses the attacker-controlled extension from std_pgs_logo when constructing the stored filename. An authenticated administrator can upload image content with a server-executable final extension, causing the file to be placed in the web-accessible logo directory and executed when requested if the web server handles that extension. This can permit arbitrary command execution, data disclosure, modification, persistence, and service disruption. This vulnerability is fixed in 16.4.0.
Weakness: CWE-434
Which versions are affected by CVE-2026-42322?
How do I fix CVE-2026-42322?
No fix has been published for CVE-2026-42322 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-42322 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42322 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-7w97-5g4p-xqvv.