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High, CVSS 8.1amended

simple-git Affected by Command Execution via Option-Parsing Bypass

CVE-2026-28291GHSA-jcxm-m3jx-f287

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (simple-git 3.32.0), 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
8.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2026-28291: 0.77% estimated exploitation activity in the next 30 days; percentile 55.62 (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.

Summary simple-git enables running native Git commands from JavaScript. Some commands accept options that allow executing another command; because this is very dangerous, execution is denied unless the user explicitly allows it. This vulnerability allows a malicious actor who can control the options to execute other commands even in a “safe” state where the user has not explicitly allowed them. The vulnerability was introduced by an incorrect patch for CVE-2022-25860. It is likely to affect all versions prior to and including 3.28.0. Detail This vulnerability was introduced by an incorrect patch for CVE-2022-25860. It was reproduced in the following environment: The issue was not reproduced on Windows 11. The -u option, like --upload-pack, allows a command to be executed. Currently, the -u and --upload-pack options are blocked in the file simple-git/src/lib/plugins/block-unsafe-operations-plugin.ts. However, the problem is that command option parsing is quite flexible. By brute…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-jcxm-m3jx-f287

  2. Revision 1 · created ·

    Published from osv record GHSA-jcxm-m3jx-f287

Agent brief

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# Patch Next advisory brief: CVE-2026-28291

Advisory: simple-git Affected by Command Execution via Option-Parsing Bypass
IDs: CVE-2026-28291, GHSA-jcxm-m3jx-f287
Record: https://patchnext.com/advisories/cve-2026-28291 (revision 2, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: simple-git 3.32.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm simple-git: affected < 3.32.0; fixed in 3.32.0

## Suggested inspection (read-only)
- `npm ls simple-git --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## 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 simple-git.
- 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-jcxm-m3jx-f287 (OSV record GHSA-jcxm-m3jx-f287 lists affected ranges: npm simple-git >=0 <3.32.0 (fixed))
- Verified: https://github.com/advisories/GHSA-jcxm-m3jx-f287 (GitHub-reviewed advisory GHSA-jcxm-m3jx-f287 lists affected ranges: npm simple-git >=0 <3.32.0)

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