Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-39cx-23x9-5c
- https://www.vulncheck.com/advisories/filebrowser-through-2.63.23-denial-of-servi
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-39cx-23x9-5c
FAQ
What is CVE-2026-90927?
CVE-2026-90927 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...
How severe is CVE-2026-90927?
CVE-2026-90927 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-90927?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.