CVE-2026-55499CWE-863broken-access-control

CVE-2026-55499

Medium · published July 31, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
25.0
In the wild
Unconfirmed
What it is

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets, event types, and hashed identifiers for unshared sibling files and folders. 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:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00331 · 25.0th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-07-31T08:17Z
References (4)
https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc · [email protected]https://github.com/cloudreve/cloudreve/releases/tag/4.17.0 · [email protected]https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8 · [email protected]https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 31 JUL 03:34Z
    Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients
    cvelistv5