Medium 4.3Published Jul 30, 2026

CVE-2026-55499Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for cloudreve

Exploited in the last 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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cloudreve cloudreve cloudreve:cloudreve (from the name)	before 4.17.0	CNA record

References

References

https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8	x-refsource-confirm
https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc	x-refsource-misc
https://github.com/cloudreve/cloudreve/releases/tag/4.17.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.