CVE-2026-54562
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductGithub.com/cloudreve/cloudreve/v4
PublishedJul 15, 2026
First seenJul 15, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- github.com/cloudreve/Cloudreve/v44.0.0-20260606025411-aaebf317a78f or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/cloudreve/Cloudreve/v4Go | v < 4.0.0-20260606025411-aaebf317a78f | 4.0.0-20260606025411-aaebf317a78f |
| github.com/cloudreve/Cloudreve/v3Go | v ≤ 3.0.0-20250225100611-da4e44b77af4, No range specified | — |
| github.com/cloudreve/CloudreveGo | No range specified | — |
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