File Browser: Trailing-slash directory deletion leaves public shares active for recreated paths

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.1 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2026-61874: 0.32% estimated exploitation activity in the next 30 days; percentile 24.80 (FIRST EPSS, 2026-11-14). This is a model estimate, not proof of exploitation or customer exposure.
• CVE-2026-62683: 0.32% estimated exploitation activity in the next 30 days; percentile 24.80 (FIRST EPSS, 2026-11-14). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary File Browser v2.63.15 can leave a public directory share behind when the shared directory is deleted through a path with a trailing slash. The share cleanup path calls `DeleteWithPathPrefix(file.Path, userID)`, but the Bolt backend performs the database prefix query with the unnormalized argument before trimming the slash for boundary checks. For a stored share at `/a`, deleting `/a/` queries for paths prefixed by `/a/`, so the exact `/a` share is never loaded and never deleted. If a directory with the same path is later recreated, the stale public share becomes active again and exposes the new directory contents through the old public URL.

Impact An authenticated user with share, download, and delete permissions can create a valid public share, delete the shared path with a trailing slash, and leave the public link in storage. The link is dormant while the path does not exist, but it exposes future content if the same path is recreated later. The final data exposure is…

Published by the source

13 Nov 2026, 23:12 UTC

Last modified by the source

13 Nov 2026, 23:15 UTC

Source last checked

14 Nov 2026, 08:05 UTC

1. Revision 2 · amended · 14 Nov 2026

   Amended from osv record GHSA-pp88-jhwj-5qh5

2. Revision 1 · created · 13 Nov 2026

   Published from ghsa record GHSA-pp88-jhwj-5qh5

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# Patch Next advisory brief: CVE-2026-62683

Advisory: File Browser: Trailing-slash directory deletion leaves public shares active for recreated paths
IDs: CVE-2026-62683, GHSA-pp88-jhwj-5qh5
Record: https://patchnext.com/advisories/cve-2026-62683 (revision 2, source checked 14 Nov 2026, 08:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/filebrowser/filebrowser/v2 2.63.17. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/filebrowser/filebrowser/v2: affected < 2.63.17; fixed in 2.63.17

## Suggested inspection (read-only)
- Go github.com/filebrowser/filebrowser/v2: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/filebrowser/filebrowser/v2.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-pp88-jhwj-5qh5 (GitHub-reviewed advisory GHSA-pp88-jhwj-5qh5 lists affected ranges: Go github.com/filebrowser/filebrowser/v2 >=0 <2.63.17)
- Verified: https://osv.dev/vulnerability/GHSA-pp88-jhwj-5qh5 (OSV record GHSA-pp88-jhwj-5qh5 lists affected ranges: Go github.com/filebrowser/filebrowser/v2 >=0 <2.63.17 (fixed))

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