CVE-2026-33738 | THREATINT

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.

PUBLISHED Reserved 2026-03-23 | Published 2026-03-26 | Updated 2026-03-27 | Assigner GitHub_M

MEDIUM: 4.8CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 7.5.3

affected

References

github.com/...Lychee/security/advisories/GHSA-5574-7f3r-hm9j exploit

github.com/...Lychee/security/advisories/GHSA-5574-7f3r-hm9j

github.com/LycheeOrg/Lychee/pull/4218

github.com/...ommit/d2e2606a0223d5a384d5b806db1b31eb587adc5c

github.com/LycheeOrg/Lychee/releases/tag/v7.5.3

cve.org (CVE-2026-33738)

nvd.nist.gov (CVE-2026-33738)

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