CVE-2026-33644

Summary

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 Software

VendorProductVersion RangeStatus
LycheeOrgLychee< 7.5.2affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References