CVE-2026-55499: Cloudreve

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets, event types, and hashed identifiers for unshared sibling files and folders. 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.