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VULNERABILITIES

CVE-2026-90927 Details

Description

filebrowser through 2.63.23 fails to limit WebSocket message size in the /api/command handler before checking permissions, allowing authenticated users to buffer arbitrarily large messages. Attackers can send oversized WebSocket messages to exhaust server heap memory and cause denial of service regardless of EnableExec setting or Execute permission.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-39cx-23x9-5c8p CISA-ADP
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-39cx-23x9-5c8p [email protected]
https://www.vulncheck.com/advisories/filebrowser-through-2.63.23-denial-of-service-via-unbounded-websocket-message [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-90927
NVD Published Date:
Sep 14, 2026
NVD Last Modified:
Sep 24, 2026
Source:
[email protected]
CVE-2026-90927 Details - Not Deferred