What’s Vulnerable › Vulnerabilities

CVE-2026-72839: filebrowser through 2.63.16 Privilege Escalation via Signup

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-09-08
• Weakness: CWE-266

Description

filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.

Affected products

• filebrowser: through 2.63.16

References

• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6
• https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6

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