CVE-2026-55499

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 v3.1

4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1

4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.19% chance of exploitation in the next 30 days, 9th percentile

Published

2026-07-31

Proof-of-concept exploits (1)

• advisories/GHSA-w8x7-h2px-xmq8

References

• CVE Record
• NVD entry

Related

• CVE-2026-55497
• CVE-2026-55500
• CVE-2026-55496
• CVE-2026-55501
• CVE-2026-55495
• CVE-2026-55502