CVE-2026-90927
filebrowser through 2.63.23 Denial of Service via unbounded WebSocket message
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | filebrowser |
| Product | filebrowser |
| Published | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
filebrowser / filebrowser
0 ≤ 2.63.23
References
Credits
🔍 alham-rizvi