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CVE-2025-21614— go-git clients vulnerable to DoS via maliciously crafted Git server replies

Quick assessment

Affected
go-git go-git
Exploitation
Public or AI PoC available; prioritize validation
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 v5.13之前版本存在安全漏洞，该漏洞源于存在拒绝服务(DoS)漏洞，允许攻击者通过提供来自Git服务器的特制响应来执行拒绝服务攻击，从而触发go-git客户端中的资源耗尽。

CVSS 7.5 · High EPSS 0.72% · P51

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-21614

Vulnerability Information
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Vulnerability Title
go-git clients vulnerable to DoS via maliciously crafted Git server replies
Source: CVE Program / CVE List V5
Vulnerability Description
go-git is a highly extensible git implementation library written in pure Go. A denial of service (DoS) vulnerability was discovered in go-git versions prior to v5.13. This vulnerability allows an attacker to perform denial of service attacks by providing specially crafted responses from a Git server which triggers resource exhaustion in go-git clients. Users running versions of go-git from v4 and above are recommended to upgrade to v5.13 in order to mitigate this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
go-git 安全漏洞
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 v5.13之前版本存在安全漏洞，该漏洞源于存在拒绝服务(DoS)漏洞，允许攻击者通过提供来自Git服务器的特制响应来执行拒绝服务攻击，从而触发go-git客户端中的资源耗尽。
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 >= 4.0.0, < 5.13.0 -

II. Public POCs for CVE-2025-21614

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 12013 chars
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III. Intelligence Information for CVE-2025-21614

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Vendor Advisories for CVE-2025-21614 (1)

IV. Related Vulnerabilities

Same product: go-git
Same vendor: go-git
Same weakness: CWE-400

V. Comments for CVE-2025-21614

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