Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M
CVE-2026-54562Cloudreve: Non-admin remote download users can SSRF loopback/internal services and read imported responses
Medium 6.5
In plain English
A medium-severity server-side request forgery in cloudreve from cloudreve. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/cloudreve/Cloudreve | no fix listed | GO-2026-6023 |
| Go | github.com/cloudreve/Cloudreve/v3 | no fix listed | GHSA-x756-g4x3-c64m |
| Go | github.com/cloudreve/Cloudreve/v3 | no fix listed | GO-2026-6023 |
| Go | github.com/cloudreve/Cloudreve/v4 | 4.0.0-20260606025411-aaebf317a78f | GHSA-x756-g4x3-c64m |
| Go | github.com/cloudreve/Cloudreve/v4 | 4.0.0-20260606025411-aaebf317a78f | GO-2026-6023 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N