medium4.3
CVE-2026-33644
Lychee is a free, open-source photo-management tool.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Lycheeorg | Lychee | before 7.5.2 |