Vulnerability · Published Sep 25, 2026 · Assigned by GitHub_M
CVE-2026-42322Piwigo: Authenticated RCE via File Upload in Logo Upload Feature
Critical 9.1
In plain English
A critical-severity unrestricted file upload in Piwigo from Piwigo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
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.
Affected products (as reported)
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/Piwigo/Piwigo/security/advisories/GHSA-7w97-5g4p-xqvv x_refsource_CONFIRM
- https://github.com/Piwigo/Piwigo/commit/1e7f7262cb30e6916779f93e66d5d6579ec75a11 x_refsource_MISC
- https://github.com/Piwigo/Piwigo/commit/4a13ec9a8f4881ae1f23bdfd24d7b90cd0802cdc x_refsource_MISC
- https://github.com/Piwigo/Piwigo/releases/tag/16.4.0 x_refsource_MISC