Auth bypass in Cloudreve
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 authenticat…
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Cloudreve — versions < 4.17.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-55499?
- CVE-2026-55499 is a medium-severity vulnerability in Cloudreve, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-07-31.
- How severe is CVE-2026-55499?
- Medium severity. CVSS v3 base score is 4.3 out of 10.