CVE-2026-55495CWE-22path-traversal

CVE-2026-55495

Medium · published July 31, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
30.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00376 · 30.4th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-07-31T08:17Z
References (4)
https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630 · [email protected]https://github.com/cloudreve/cloudreve/releases/tag/4.17.0 · [email protected]https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737 · [email protected]https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 31 JUL 02:58Z
    Cloudreve: Path Traversal in WOPI PUT_RELATIVE Allows Arbitrary File Creation in Owner Account
    cvelistv5