medium4.3
CVE-2026-55499
Cloudreve: Broken Access Control in file event stream: a single-file share recipient is subscribed to the owner's parent folder and receives activity events for unshared siblings
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/cloudreve/Cloudreve/v4 | < 4.0.0-20260613030215-0b00dd308f13 | 4.0.0-20260613030215-0b00dd308f13 |
| go | github.com/cloudreve/Cloudreve/v3 | <= 3.0.0-20250225100611-da4e44b77af4 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w8x7-h2px-xmq8
- https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8
- https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc
- https://github.com/cloudreve/cloudreve/releases/tag/4.17.0