File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. (CVE-2026-72837)
File Browser versions prior to 2.63.20 contain a vulnerability where the createUserDir isolation is not enforced in proxy and hook authentication auto-provisioning paths. This flaw allows attackers with valid upstream-authenticated credentials to access and manipulate files of other users by exploiting improper server root scope assignment. The vulnerability has a high severity rating with a CVSS score of 8.8.
AI Analysis
Technical Summary
File Browser versions before 2.63.20 fail to honor the createUserDir isolation setting in proxy and hook authentication auto-provisioning paths. This improper enforcement leads to a server root scope assignment issue, enabling attackers who have valid upstream-authenticated credentials to read, modify, delete, and share files belonging to other users. The vulnerability is tracked as CVE-2026-72837 and is associated with CWE-284 (Improper Access Control).
Potential Impact
Attackers with valid upstream-authenticated credentials can bypass intended user directory isolation controls, resulting in unauthorized access to other users' files. This includes the ability to read, modify, delete, and share files, potentially leading to data breaches, data loss, and unauthorized data dissemination.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to trusted users and consider additional access controls where possible.
File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. (CVE-2026-72837)
Description
File Browser versions prior to 2.63.20 contain a vulnerability where the createUserDir isolation is not enforced in proxy and hook authentication auto-provisioning paths. This flaw allows attackers with valid upstream-authenticated credentials to access and manipulate files of other users by exploiting improper server root scope assignment. The vulnerability has a high severity rating with a CVSS score of 8.8.
CVSS v3.1
Score 8.8high
Affected software
pkg:github/filebrowser/filebrowserRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
File Browser versions before 2.63.20 fail to honor the createUserDir isolation setting in proxy and hook authentication auto-provisioning paths. This improper enforcement leads to a server root scope assignment issue, enabling attackers who have valid upstream-authenticated credentials to read, modify, delete, and share files belonging to other users. The vulnerability is tracked as CVE-2026-72837 and is associated with CWE-284 (Improper Access Control).
Potential Impact
Attackers with valid upstream-authenticated credentials can bypass intended user directory isolation controls, resulting in unauthorized access to other users' files. This includes the ability to read, modify, delete, and share files, potentially leading to data breaches, data loss, and unauthorized data dissemination.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to trusted users and consider additional access controls where possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-6x93-4cv7-m749
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-72837"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7f43febf8831d5395f3c65
Added to database: 08/14/2026, 16:36:14 UTC
Last enriched: 08/14/2026, 16:55:28 UTC
Last updated: 08/14/2026, 17:21:19 UTC
Views: 2
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