sviehb/jefferson vulnerable to path traversal

Exploitation

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

CVSS

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

EPSS

• CVE-2022-4885: 0.77% estimated exploitation activity in the next 30 days; percentile 55.56 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

A vulnerability has been found in the sviehb/jefferson JFFS2 filesystem extraction tool. This vulnerability affects unknown code of the file src/scripts/jefferson. The manipulation leads to path traversal. The attack can be initiated remotely. Upgrading to version 0.4 is able to address this issue as it includes https://github.com/sviehb/jefferson/commit/53b3f2fc34af0bb32afbcee29d18213e61471d87.

Published by the source

11 Jan 2023, 18:30 UTC

Last modified by the source

7 Jul 2026, 11:56 UTC

Source last checked

26 Oct 2026, 13:12 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7jrw-p8jc-v6qw

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7jrw-p8jc-v6qw

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# Patch Next advisory brief: CVE-2022-4885

Advisory: sviehb/jefferson vulnerable to path traversal
IDs: CVE-2022-4885, GHSA-7jrw-p8jc-v6qw
Record: https://patchnext.com/advisories/cve-2022-4885 (revision 2, source checked 26 Oct 2026, 13:12 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: jefferson 0.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI jefferson: affected < 0.4; fixed in 0.4

## Suggested inspection (read-only)
- `python -m pip show jefferson`: 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 jefferson.
- 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://osv.dev/vulnerability/GHSA-7jrw-p8jc-v6qw (OSV record GHSA-7jrw-p8jc-v6qw lists affected ranges: PyPI jefferson >=0 <0.4 (fixed))
- Verified: https://github.com/advisories/GHSA-7jrw-p8jc-v6qw (GitHub-reviewed advisory GHSA-7jrw-p8jc-v6qw lists affected ranges: PyPI jefferson >=0 <0.4)

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