CVE-2026-55497: Cloudreve

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded allocation and terminates the Cloudreve process through fatal out-of-memory behavior. This issue is fixed in version 4.17.0.

Affected products

• Cloudreve Cloudreve: before 4.17.0 (fixed in 4.17.0)

Published 2026-07-31. Last modified 2026-09-08.