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CVE-2026-45022— go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git

Quick assessment

Affected
go-git go-git
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

go-git是go-git开源的一个用纯 Go 编写的高度可扩展的 git 实现库。 go-git 5.19.0之前版本和6.0.0-alpha.3之前版本存在数据伪造问题漏洞，该漏洞源于解析畸形Git对象的方式与上游Git不同，且提交签名和验证逻辑基于解析后的表示而非原始对象字节，可能导致签名验证绕过。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1553.005 · Mark-of-the-Web Bypass

Affected Version Matrix 2

VendorProduct Version RangeStatus
go-git go-git < 5.19.0 affected
>= 6.0.0-alpha.1, < 6.0.0-alpha.3 affected
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I. Basic Information for CVE-2026-45022

Vulnerability Information
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Vulnerability Title
go-git: Improper parsing of specially crafted objects may lead to inconsistent interpretation compared to upstream Git
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：规范化之前验证
Source: CVE Program / CVE List V5
Vulnerability Title
go-git 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
go-git是go-git开源的一个用纯 Go 编写的高度可扩展的 git 实现库。 go-git 5.19.0之前版本和6.0.0-alpha.3之前版本存在数据伪造问题漏洞，该漏洞源于解析畸形Git对象的方式与上游Git不同，且提交签名和验证逻辑基于解析后的表示而非原始对象字节，可能导致签名验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
go-git go-git < 5.19.0 -

II. Public POCs for CVE-2026-45022

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III. Intelligence Information for CVE-2026-45022

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Vendor Advisories for CVE-2026-45022 (1)

Same Patch Batch · go-git · 2026-05-27 · 3 CVEs total

CVE-2026-45571 5.4 MEDIUM go-git: Crafted repositories may modify main and submodule .git directories
CVE-2026-45570 go-git: Improper single-quote escaping in go-git SSH transport

IV. Related Vulnerabilities

Same product: go-git
Same vendor: go-git
Same weakness: CWE-180

V. Comments for CVE-2026-45022

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