Auth bypass in Cloudreve
CVE-2026-101048
Cloudreve before 4.17.0 registers the administrative node test endpoints (POST /api/v4/admin/node/test and POST /api/v4/admin/node/test/downloader) without requiring the Admin.Write OAuth scope, unlike the node create/update/delete routes. An OAuth client that has been authorized by an administrator with only the Admin.Read scope can therefore submit attacker-controlled node definitions and cause the Cloudreve server to issue outbound requests to arbitrary URLs, enabling blind server-side request forgery, internal service probing, and delivery of signed Cloudreve slave-style requests to attacker-chosen endpoints.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/cloudreve/cloudreve/security/advisories/GHSA-v6w6-358x-2433 (vendor-advisory)
- www.vulncheck.com/advisories/cloudreve-before-4.17.0-ssrf-via-admin-read-oauth-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101048?
- CVE-2026-101048 is a medium-severity vulnerability in Cloudreve, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-09-27.
- How severe is CVE-2026-101048?
- Medium severity. CVSS v3 base score is 5.4 out of 10.