CVE-2026-77467

Impact

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.

Affected products

Versions were read from the advisory text. No structured product data has been published for this record yet.

Weakness classification

References

• NVD record
• CVE.org record
• https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945
• https://github.com/LycheeOrg/Lychee/pull/4511
• https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0
• https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79