# CVE-2026-45022

## Summary

- **CVE ID:** CVE-2026-45022
- **Severity:** HIGH
- **CVSS Score:** 7 (CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N)
- **CWE:** CWE-180, CWE-345
- **Published:** May 27, 2026
- **Last Modified:** May 27, 2026

## Description

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git’s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git’s commit signing and verification logic operates over commit data reconstructed from go-git’s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.

## Affected Products

- go-git — go-git (< 5.19.0)
- go-git — go-git (>= 6.0.0-alpha.1, < 6.0.0-alpha.3)

## References

- [CNA](https://github.com/go-git/go-git/security/advisories/GHSA-389r-gv7p-r3rp)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 5.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._