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Vulnerability record · CVE-2026-85750 · published 25 September 2026

CVE-2026-85750: Improper input validation vulnerability

Piwigo before v16.4.0 is vulnerable to arbitrary file read and remote code execution in image upload handling when using the Imagick library due to insufficient validation and unsafe processing of user-supplied image files. By abusing format confusion (e.g., disguising SVG content as PNG), an attacker can trigger unintended interpretation of embedded SVG elements that reference local files. In more advanced scenarios, the Imagick support for Magick Scripting Language (MSL) may be abused to process attacker-controlled instructions, potentially leading to unauthorized server-side file writes and remote code execution, depending on configuration. This has been patched in 16.4.0.

7.2 CVSS 3.1 High EPSS 1.2% · top 32.9% CWE-20 · Improper input validation Deferred
7.2CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
25 Sep 2026Last modified by NVD

Description

Piwigo before v16.4.0 is vulnerable to arbitrary file read and remote code execution in image upload handling when using the Imagick library due to insufficient validation and unsafe processing of user-supplied image files. By abusing format confusion (e.g., disguising SVG content as PNG), an attacker can trigger unintended interpretation of embedded SVG elements that reference local files. In more advanced scenarios, the Imagick support for Magick Scripting Language (MSL) may be abused to process attacker-controlled instructions, potentially leading to unauthorized server-side file writes and remote code execution, depending on configuration. This has been patched in 16.4.0.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/Piwigo/Piwigo/security/advisories/GHSA-j9q6-q52g-g8jw
https://www.helx.io/en/blog/advisory-piwigo
https://github.com/Piwigo/Piwigo/security/advisories/GHSA-j9q6-q52g-g8jw

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Source: NIST National Vulnerability Database (record CVE-2026-85750), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.