CVE-2026-33644 | THREATINT

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.

PUBLISHED Reserved 2026-03-23 | Published 2026-03-26 | Updated 2026-03-30 | Assigner GitHub_M

LOW: 2.3CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

< 7.5.2

affected

References

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

github.com/...ommit/28c5261fb9deab4f9420c8cc2f73a87425939107

cve.org (CVE-2026-33644)

nvd.nist.gov (CVE-2026-33644)

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