All vulnerabilities
CVE-2026-101056GHSA-vx2m-jpxr-xv7wGO-2026-6287

Cloudreve before 4.16.1 Authentication Bypass via Cached Context Hint

cloudreve cloudreveGoLibraries & packages
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.19%Chance of exploitation activity in the next 30 days, higher than 8% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in4.16.1Fixed versionCVE List
Published27 Sep 2026Updated 8 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 3

  • cloudreveaffected: all versions before 4.16.1CVE List
  • cloudreveunaffected: 4.16.1CVE List
  • github.com/cloudreve/Cloudreve/v4, Gofrom first release, through 4.0.0-20260606032813-26b6b1044b02OSV

References 2