CVE-2026-62323

Summary

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, ViewerSessionValidation uses only the session-id prefix of a WOPI access token and does not enforce the requested viewer action, allowing a malicious or compromised WOPI viewer with a view session to forge the token suffix and invoke WOPI write routes for the underlying file. This issue is fixed in version 4.17.0.

Affected Software

Weaknesses

• CWE-863: CWE-863: Incorrect Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp

References

• https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp
• https://github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9
• https://github.com/cloudreve/cloudreve/releases/tag/4.17.0

• ←Previous
• Next→