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TI-2026-26117 Aliases CVE-2026-33738

Lychee Vulnerable to Stored XSS via Photo Description in RSS/Atom/JSON Feed (No Sanitization on Public Endpoint)

Priority MEDIUM 55CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00222 12th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Lychee (LycheeOrg): 7.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LycheeOrgLycheebefore 7.5.37.5.3Patch availableCNA
  • Lychee VendorLycheeOrg Affected before 7.5.3 Fixed in 7.5.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*before 7.5.3VulnerableLycheeOrg
  • cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:* Versions before 7.5.3 Vulnerable ·LycheeOrg

Remediation

  • Fix · CNA Lychee (LycheeOrg) Fixed in 7.5.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33738

References

Exploit 1

Patch 1

Other 2

  • TI-2024-16953 Cross-site Request Forgery (CSRF) vulnerability in Lychee version 3.1.6, allows remote… CVSS 3.1HIGH 8.3
  • TI-2024-16952 Cross Site Scripting (XSS) vulnerability in Lychee 3.1.6, allows remote attackers to… CVSS 3.1MEDIUM 6.1
  • TI-2026-25930 Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link-local IPs not blocked CVSS 4.0MEDIUM 5.3
  • TI-2026-28813 Incorrect authorization in LycheeOrg Lychee CVSS 4.0LOW 2.3
  • TI-2023-28525 Lychee is vulnerable to an SQL Injection in explain DB queries. CVSS 3.1CRITICAL 9.8
  • TI-2021-19511 Lychee-v3 3.2.16 is affected by a Cross Site Scripting (XSS) vulnerability in… CVSS 3.1MEDIUM 6.1
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences