CVE-2026-33644

Published March 26th, 2026

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CVSS v3

4.3

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in `PhotoUrlRule.php` can be bypassed using DNS rebinding. The IP validation check (line 86-89) only activates when the hostname is an IP address. When a domain name is used, `filter_var($host, FILTER_VALIDATE_IP)` returns `false`, skipping the entire check. Version 7.5.2 patches the issue.

LycheeOrg/Lychee

A great looking and easy-to-use photo-management-system you can run on your server, to manage and share photos.

GitHub

4.18K