CVE-2026-102827 simple-git: unsafe-operations plugin bypass via git long-option abbreviation (--receive-p/--exe) -> command execution (residual of CVE-2026-28291)
Attackers can bypass unsafe operation checks in simple-git using abbreviated Git options to execute arbitrary commands via push arguments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102827?
CVE-2026-102827 is a high-severity command injection vulnerability in steveukx git-js, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-102827?
2 open source packages ship an affected version, including simple-git. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
simple-git npm | All versions | 4.0.0 |
simple-git npm | All versions | 4.0.0 |
Products include Simple-Git Project Simple-Git.
How do I fix CVE-2026-102827?
Upgrade simple-git to 4.0.0 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-102827 being exploited?
There is no known exploitation of CVE-2026-102827 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in steveukx git-js
- CVE-2026-28292 simple-git has blockUnsafeOperationsPlugin bypass via case-insensitive protocol.allow config key that enables RCE
- CVE-2026-102828 simple-git unsafe-operation guard does not block trailer command configuration
- CVE-2026-6951 simple-git is vulnerable to Remote Code Execution
- CVE-2026-102826 simple-git allows command execution through unblocked Git configuration includes
- CVE-2026-28291 simple-git has Command Execution via Option-Parsing Bypass
Sources
Also known as CLEANSTART-2026-PO58862, CLEANSTART-2026-UW23972, CLSA-2026-1791973734, GHSA-858h-whjf-mvg5, MINI-64cw-x25m-863p, MINI-mm8q-57xg-83w4 and 1 more.