CVE-2026-55495

Published: Jul 31, 2026Modified: Sep 8, 2026Deferred

4.3

Vector

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

Exploitability: 2.8 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

Description

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUT_RELATIVE handler passes X-WOPI-SuggestedTarget to URI.JoinRaw as a path rather than a filename, allowing slash and dot-dot segments to escape the source file directory and create or conditionally overwrite files elsewhere in the same owner account. This issue is fixed in version 4.17.0.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (4)

https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630

Source: security-advisories@github.com

https://github.com/cloudreve/cloudreve/releases/tag/4.17.0

Source: security-advisories@github.com

https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737

Source: security-advisories@github.com

https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.