Security Advisory

CVE-2026-33644

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-26 20:04:18

Last updated 2026-03-30 11:30:40

Assigner GitHub_M

State PUBLISHED

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.

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