---
id: CVE-2026-42322
title: Piwigo is a full featured open source photo gallery application for the web
summary: >-
  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 whe…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: Piwigo
product: Piwigo
affected:
  - Piwigo < 16.4.0
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T16:17:25.563'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42322'
references:
  - url: >-
      https://github.com/Piwigo/Piwigo/commit/1e7f7262cb30e6916779f93e66d5d6579ec75a11
    label: security-advisories@github.com
  - url: >-
      https://github.com/Piwigo/Piwigo/commit/4a13ec9a8f4881ae1f23bdfd24d7b90cd0802cdc
    label: security-advisories@github.com
  - url: 'https://github.com/Piwigo/Piwigo/releases/tag/16.4.0'
    label: security-advisories@github.com
  - url: 'https://github.com/Piwigo/Piwigo/security/advisories/GHSA-7w97-5g4p-xqvv'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T16:12:08.724Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.