CVE-2026-101056

MEDIUM 5.3

Cloudreve before 4.16.1 Authentication Bypass via Cached Context Hint

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-863
Vendor	cloudreve
Product	cloudreve
Published	Sep 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

cloudreve / cloudreve

0 < 4.16.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vx2m-jpxr-xv7w vulncheck.com: https://www.vulncheck.com/advisories/cloudreve-before-4.16.1-authentication-bypass-via-cached-context-hint

Credits

🔍 riodrwn