CVE-2026-47712— Dulwich 路径遍历漏洞
一分钟漏洞结论
影响对象
jelmer dulwich
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Dulwich是Jelmer Vernooij个人开发者的一款纯Python实现的Git仓库操作接口。 Dulwich 1.2.5之前版本存在路径遍历漏洞，该漏洞源于从提交主题行派生补丁文件名时未清理路径分隔符和父目录组件，可能导致恶意提交主题将生成的补丁文件导向请求的输出目录之外。
可能的 ATT&CK 技术 1 AI
T1564.004 · NTFS File Attributes
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一、 漏洞 CVE-2026-47712 基础信息
漏洞信息
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Vulnerability Title
Dulwich doesn't sanitize commit subjects in `porcelain.format_patch`
来源: CVE Program / CVE List V5
Vulnerability Description
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, dulwich.porcelain.format_patch(outdir=...) derives each patch filename from the commit's subject line. Prior to this fix, get_summary only replaced spaces with dashes - path separators (/, \), parent-directory components (..), and other filename-hostile characters (e.g. :) were preserved verbatim and passed straight into os.path.join(outdir, f"{i:04d}-{summary}.patch"). A malicious commit subject could therefore direct the generated patch file outside the requested outdir. This is fixed in Dulwich 1.2.5. Users should upgrade to 1.2.5 or later. dulwich.patch.get_summary now mirrors git's format_sanitized_subject: only `[A-Za-z0-9._]` are kept, runs of other characters collapse to a single -, consecutive . collapse to a single ., trailing ./- are stripped, and the result is length-limited. This makes the returned string safe to embed as a filename component, so format_patch can no longer be steered out of outdir via the commit subject. Until upgrading, callers that pass untrusted commits to porcelain.format_patch can use stdout=True and write the patch to a destination they control, rather than letting format_patch choose the filename; validate the chosen path before opening - e.g. compare os.path.realpath(returned_path) against os.path.realpath(outdir) and reject any patch whose resolved path is not inside outdir; and/or pre-screen commits and refuse to format any whose subject's first line contains /, \, .., or other characters that are not safe on the target filesystem.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
Vulnerability Title
Dulwich 路径遍历漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Dulwich是Jelmer Vernooij个人开发者的一款纯Python实现的Git仓库操作接口。 Dulwich 1.2.5之前版本存在路径遍历漏洞，该漏洞源于从提交主题行派生补丁文件名时未清理路径分隔符和父目录组件，可能导致恶意提交主题将生成的补丁文件导向请求的输出目录之外。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-47712 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-47712 补丁与修复 (1)
CVE-2026-47712 厂商安全公告 (1)
CVE-2026-47712 厂商页面 (1)
同批安全公告 · jelmer · 2026-06-10 · 共 5 条
| CVE-2026-42305 | 8.8 HIGH | Dulwich 路径遍历漏洞 |
| CVE-2026-52726 | 7.5 HIGH | Dulwich 路径遍历漏洞 |
| CVE-2026-47734 | 5.7 MEDIUM | Dulwich 资源管理错误漏洞 |
| CVE-2026-42563 | Dulwich 操作系统命令注入漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-47712
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