FileGator: Missing authorization in POST /upload allows cross-user read and deletion of temporary files

Exploitation

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

CVSS

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

EPSS

• CVE-2026-94619: 0.17% estimated exploitation activity in the next 30 days; percentile 6.57 (FIRST EPSS, 2026-11-10). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary `POST /upload` uses the request-supplied `resumableFilename` directly as a key into the shared temporary directory, without the character filter it applies to `resumableIdentifier` and without namespacing it per user. A valid user holding the `upload` permission can read any file in that directory into their own home directory, append to it, and delete it. This reproduces the cross-user batch-archive disclosure of GHSA-f74m-x83r-c4v4 through a different route — it still works with the fix for that advisory (PR #597) applied — and additionally allows deleting the login rate-limit lockfile. Reported with explicit preconditions and bounded impact, as before: the primitive is confined to the temporary directory, not the whole filesystem.

Details - `backend/Controllers/UploadController.php:61` — `$file_name = $request->input('resumableFilename', 'file')` is not passed through the `preg_replace('/[^0-9a-zA-Z_]/', '', ...)` that line 66 applies to `resumableIdentifier`. -…

Published by the source

9 Nov 2026, 22:20 UTC

Last modified by the source

9 Nov 2026, 22:30 UTC

Source last checked

10 Nov 2026, 06:35 UTC

1. Revision 2 · amended · 10 Nov 2026

   Amended from osv record GHSA-44r8-3p76-84mw

2. Revision 1 · created · 9 Nov 2026

   Published from ghsa record GHSA-44r8-3p76-84mw

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# Patch Next advisory brief: CVE-2026-94619

Advisory: FileGator: Missing authorization in POST /upload allows cross-user read and deletion of temporary files
IDs: CVE-2026-94619, GHSA-44r8-3p76-84mw
Record: https://patchnext.com/advisories/cve-2026-94619 (revision 2, source checked 10 Nov 2026, 06:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: filegator/filegator 7.15.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist filegator/filegator: affected < 7.15.0; fixed in 7.15.0

## Suggested inspection (read-only)
- Packagist filegator/filegator: 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 filegator/filegator.
- 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-44r8-3p76-84mw (GitHub-reviewed advisory GHSA-44r8-3p76-84mw lists affected ranges: Packagist filegator/filegator >=0 <=7.14.4)
- Verified: https://osv.dev/vulnerability/GHSA-44r8-3p76-84mw (OSV record GHSA-44r8-3p76-84mw lists affected ranges: Packagist filegator/filegator >=0 <7.15.0 (fixed))

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