How severe is GHSA-4g4p-42wc-9f3m?

GHSA-4g4p-42wc-9f3m has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by GHSA-4g4p-42wc-9f3m?

GHSA-4g4p-42wc-9f3m affects the following packages: github.com/git-lfs/git-lfs (Go). Ecosystems affected: Go.

How do I fix GHSA-4g4p-42wc-9f3m?

Update github.com/git-lfs/git-lfs to version 2.12.1 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is GHSA-4g4p-42wc-9f3m actively exploited in the wild?

Yes. There are 12 known exploit references for GHSA-4g4p-42wc-9f3m, including 9 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-4g4p-42wc-9f3m?

GHSA-4g4p-42wc-9f3m has an EPSS (Exploit Prediction Scoring System) score of 92.9%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is GHSA-4g4p-42wc-9f3m?

GHSA-4g4p-42wc-9f3m is classified as CWE-427 (CWE-427). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-4g4p-42wc-9f3m published, and has it been updated?

GHSA-4g4p-42wc-9f3m was published on February 11, 2022 and was last updated on December 6, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

GHSA-4g4p-42wc-9f3m

CRITICAL

Git LFS can execute a Git binary from the current directory

Also known asBIT-git-lfs-2020-27955CVE-2020-27955

Published

Feb 11, 2022

Updated

Dec 6, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

12 known

EPSS Exploitation Probability

via FIRST.org ↗

92.9%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

🐹github.com/git-lfs/git-lfs

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Impact

On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems.

This occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator.

Patches

This version should be patched in v2.12.1, which will be released in coordination with this security advisory.

Workarounds

Other than avoiding untrusted repositories, there is no workaround.

For more information

If you have any questions or comments about this advisory:

Start a discussion in the Git LFS discussion page.
If you cannot open a discussion, please email the core team using their usernames at github.com.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/git-lfs/git-lfs`	all versions	2.12.1

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.