SSRF in Cloudreve
CVE-2026-54562
Cloudreve is a self-hosted file management and sharing system. Prior to 4.16.1, Cloudreve's remote download workflow accepts user-supplied URLs at POST /api/v4/workflow/download and passes them to the configured downloader without blocking loopback, localhost, IPv6 localhost, or redirect-to-loopback targets, allowing a non-admin user with remote download permission to fetch internal-only URLs and read the response after it is imported into the user's own files. This issue is fixed in version 4.16.1.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Cloudreve — versions < 4.16.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-54562?
- CVE-2026-54562 is a medium-severity vulnerability in Cloudreve, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-07-15.
- How severe is CVE-2026-54562?
- Medium severity. CVSS v3 base score is 6.5 out of 10.