What’s Vulnerable › Vulnerabilities

CVE-2026-54097: File Browser: Cross-user unauthorized share-link deletion via unbounded prefix match in DeleteWithPathPrefix

• Severity: high (CVSS 7.2 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-06-26
• Weakness: CWE-639

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, a low-privileged authenticated user of filebrowser (with create + delete permissions in their own isolated scope) can silently destroy share-link records belonging to any other user — including the administrator — by performing a legitimate DELETE on a file in their own directory whose logical path happens to be a byte-prefix of another user's stored share.Link.Path. The file contents of the victim are not exposed, but the victim's share links are irrevocably wiped. This vulnerability is fixed in 2.63.6.

Affected products

• filebrowser: before 2.63.6

References

• https://github.com/filebrowser/filebrowser/commit/0231b7ebdfbe77a6c54027d30c4856c3fd81ee4d
• https://github.com/filebrowser/filebrowser/releases/tag/v2.63.6
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5ww9-jg6q-38r7

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