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Critical, CVSS 9.9amended

django-s3file is vulnerable to relative path traversal

CVE-2026-42196GHSA-67qg-7284-2277

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (django-s3file 7.0.2), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N · score source
EPSS
  • CVE-2026-42196: 0.56% estimated exploitation activity in the next 30 days; percentile 46.97 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact `S3FileMiddleware` is vulnerable to relative path traversal attacks, where an attacker can use a modified request to escape pre-signed upload locations and have the Django application load files from random locations into `request.FILES` Depending on how files are handled, this may lead to confidentiality and integrity issues.

Patches Django-S3File urges all users to update to a patched version >=7.0.2.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 6 · amended ·

    Amended from osv record GHSA-67qg-7284-2277

  2. Revision 5 · amended ·

    Amended from ghsa record GHSA-67qg-7284-2277

  3. Revision 4 · amended ·

    Amended from ghsa record GHSA-67qg-7284-2277

  4. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  5. Revision 2 · amended ·

    Amended from osv record GHSA-67qg-7284-2277

  6. Revision 1 · created ·

    Published from ghsa record GHSA-67qg-7284-2277

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-42196

Advisory: django-s3file is vulnerable to relative path traversal
IDs: CVE-2026-42196, GHSA-67qg-7284-2277
Record: https://patchnext.com/advisories/cve-2026-42196 (revision 6, source checked 28 Oct 2026, 06:10 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: django-s3file 7.0.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI django-s3file: affected < 7.0.2; fixed in 7.0.2

## Suggested inspection (read-only)
- `python -m pip show django-s3file`: prints the installed version. Run with the environment that serves production active.

## 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 django-s3file.
- 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-67qg-7284-2277 (GitHub-reviewed advisory GHSA-67qg-7284-2277 lists affected ranges: PyPI django-s3file >=0 <=7.0.1)
- Verified: https://osv.dev/vulnerability/GHSA-67qg-7284-2277 (OSV record GHSA-67qg-7284-2277 lists affected ranges: PyPI django-s3file >=0 <7.0.2 (fixed))

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