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CVE

CWE

Training

CVE-2026-33644

Published: Mar 26, 2026

Modified: Mar 30, 2026

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.

Vendor	Product	Versions
LycheeOrg	Lychee	affected `< 7.5.2`

Weaknesses (CWE)

References

https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5245-4p8c-jwff

x_refsource_CONFIRM

https://github.com/LycheeOrg/Lychee/commit/28c5261fb9deab4f9420c8cc2f73a87425939107

x_refsource_MISC

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