CVE-2026-55499GHSA-W8X7-H2PX-XMQ8GO-2026-6102
Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.17.0, 4.0.0-20260613030215-0b00dd308f13
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- cloudreve cloudreve
fixed in 4.17.0
- github.com/cloudreve/Cloudreve/v4Go
fixed in 4.0.0-20260613030215-0b00dd308f13
- github.com/cloudreve/Cloudreve/v3Go
through 3.0.0-20250225100611-da4e44b77af4
- github.com/cloudreve/CloudreveGo
All versions
- github.com/cloudreve/Cloudreve/v3Go
All versions