---
id: CVE-2026-77467
title: 'Lychee is a free, open-source photo-management tool'
summary: >-
  Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee
  enables ImageMagick PDF support with Ghostscript but does not apply an
  effective pre-render limit to PDF page dimensions in
  ImagickHandler::loadPdf(). An authent…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-400
  - CWE-770
vendor: LycheeOrg
product: Lychee
affected:
  - Lychee < 7.7.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T17:17:27.727'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77467'
references:
  - url: >-
      https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945
    label: security-advisories@github.com
  - url: 'https://github.com/LycheeOrg/Lychee/pull/4511'
    label: security-advisories@github.com
  - url: 'https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-15T17:18:20.100Z'
---

## Overview

Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.