File Browser Privilege Escalation Vulnerability in Authenticated Sessions
CVE-2026-72837

8.7HIGH

Key Information:

Vendor

Filebrowser

Status
Filebrowser
Vendor
CVE Published:
14 August 2026

What is CVE-2026-72837?

A critical vulnerability in File Browser versions prior to 2.63.20 allows attackers with valid upstream-authenticated credentials to bypass createUserDir isolation and exploit authentication auto-provisioning paths. This weakness enables unauthorized access to read, modify, delete, and share files belonging to other users, jeopardizing the integrity of user data and overall system security.

Affected Version(s)

filebrowser 0 < 2.63.20

filebrowser 2.63.20

References

https://github.com/filebrowser/filebrowser/security/advis...
vendor-advisory
https://www.vulncheck.com/advisories/file-browser-before-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

thesmartshadow
B1gN0Se
hacdias
.