CVE-2026-33644

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/LycheeOrg/Lychee/commit/28c5261fb9deab4f9420c8cc2f73a87425939107	Patch
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5245-4p8c-jwff	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-26 21:17

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33644

Mitre link : CVE-2026-33644

CVE.ORG link : CVE-2026-33644

JSON object : View

Products Affected

lycheeorg

lychee

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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