CVE-2026-33738
Lychee Vulnerable to Stored XSS via Photo Description in RSS/Atom/JSON Feed (No Sanitization on Public Endpoint)
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.
INFO
Published Date :
March 26, 2026, 9:17 p.m.
Last Modified :
March 30, 2026, 6:45 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Lychee to version 7.5.3 or later.
- Sanitize user-generated content before rendering.
- Avoid unescaped output in templates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33738.
| URL | Resource |
|---|---|
| https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adc5c | Patch |
| https://github.com/LycheeOrg/Lychee/pull/4218 | Issue Tracking |
| https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3 | Release Notes |
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j | Exploit Vendor Advisory |
| https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33738 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33738
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33738 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33738 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:* versions up to (excluding) 7.5.3 Added Reference Type GitHub, Inc.: https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adc5c Types: Patch Added Reference Type GitHub, Inc.: https://github.com/LycheeOrg/Lychee/pull/4218 Types: Issue Tracking Added Reference Type GitHub, Inc.: https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 27, 2026
Action Type Old Value New Value Added Reference https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j -
New CVE Received by [email protected]
Mar. 26, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-79 Added Reference https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adc5c Added Reference https://github.com/LycheeOrg/Lychee/pull/4218 Added Reference https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3 Added Reference https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j