Auth bypass in Cloudreve
CVE-2026-101056
Cloudreve before 4.16.1 fails to revalidate share access when restoring cached navigator state from a context_hint UUID. Attackers who previously had valid share access can replay the cached hint to generate signed file URLs for up to 300 seconds after the share is deleted, expires, or reaches zero remaining downloads.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
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-vx2m-jpxr-xv7w (vendor-advisory)
- www.vulncheck.com/advisories/cloudreve-before-4.16.1-authentication-bypass-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-101056?
- CVE-2026-101056 is a medium-severity vulnerability in Cloudreve, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-09-27.
- How severe is CVE-2026-101056?
- Medium severity. CVSS v3 base score is 5.3 out of 10.