CVE-2026-33738 — MEDIUM (5.4)

Vulnerability Description

Lychee is a free, open-source photo-management tool. Prior to version 7.5.3, the photo `description` field is stored without HTML sanitization and rendered using `{!! $item->summary !!}` (Blade unescaped output) in the RSS, Atom, and JSON feed templates. The `/feed` endpoint is publicly accessible without authentication, allowing any RSS reader to execute attacker-controlled JavaScript. Version 7.5.3 fixes the issue.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Lycheeorg	Lychee	< 7.5.3

Related Weaknesses (CWE)

CWE-79

References

https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adPatch
https://github.com/LycheeOrg/Lychee/pull/4218Issue Tracking
https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3Release Notes
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9jExploitVendor Advisory
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9jExploitVendor Advisory

FAQ

What is CVE-2026-33738?

CVE-2026-33738 is a vulnerability with a CVSS score of 5.4 (MEDIUM). Lychee is a free, open-source photo-management tool. Prior to version 7.5.3, the photo `description` field is stored without HTML sanitization and rendered using `{!! $item->summary !!}` (Blade unesca...

How severe is CVE-2026-33738?

CVE-2026-33738 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33738?

Check the references section above for vendor advisories and patch information. Affected products include: Lycheeorg Lychee.