CVE-2026-55499
Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients
- State
- Published
- Severity
- 4.3 Medium
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Reserved
- Jun 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
cloudrevecloudreve |
|
References
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