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CVE-2026-33644

Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
LycheeOrg / Lycheeaffected < 7.5.2

CWE

CWE-918

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.