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.
Published: 2026-09-14
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 16 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Sep 2026 13:00:00 +0000

Type Values Removed Values Added
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.
Title filebrowser through 2.63.23 Denial of Service via unbounded WebSocket message
First Time appeared Filebrowser
Filebrowser filebrowser
Weaknesses CWE-400
CPEs cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*
Vendors & Products Filebrowser
Filebrowser filebrowser
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Filebrowser Filebrowser
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-16T14:58:23.070Z

Reserved: 2026-09-14T11:33:51.885Z

Link: CVE-2026-90927

cve-icon Vulnrichment

Updated: 2026-09-16T14:57:58.835Z

cve-icon NVD

Status : Received

Published: 2026-09-14T13:19:30.710

Modified: 2026-09-16T15:18:44.057

Link: CVE-2026-90927

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T14:15:05Z

Weaknesses