CVE-2026-27735
mcp-server-git : Path traversal in git_add allows staging files outside repository boundaries
描述
In `mcp-server-git` versions prior to 2026.1.14, the `git_add` tool did not validate that file paths provided in the files argument were within the repository boundaries. The tool used GitPython's `repo.index.add(`, which did not enforce working-tree boundary checks for relative paths. As a result, relative paths containing `../` sequences that resolved outside the repository were accepted and staged into the Git index, potentially allowing sensitive files to be exfiltrated via subsequent commit and push operations. The fix in PR #3164 switches to `repo.git.add()`, which delegates to the Git CLI and properly rejects out-of-tree paths. Users are advised to upgrade to 2026.1.14 or newer to remediate this issue. mcp-server-git thanks https://hackerone.com/0dd-g for reporting and contributing the fix.
如何修補 CVE-2026-27735
要修補 CVE-2026-27735,請將受影響套件升級到下列已修補版本。
- —升級至 2026.1.14 或更新版本
- —升級至 2026.1.14 或更新版本
CVE-2026-27735 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 2026.1.14
- from 0, < 2026.1.14
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N |