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CVE-2026-57442— MCPVault: PathFilter restricted directories (.git/.obsidian/node_modules) only denied at vault root, not nested

Quick assessment

Affected
bitbonsai mcpvault
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.

MCPVault 是一个轻量级的模型上下文协议（Model Context Protocol）服务器，用于安全地访问 Obsidian 库中的文件。在 0.11.5 版本之前，位于 中的 PathFilter 使用了基于根锚定的拒绝列表模式，因此嵌套的 、 和 路径段无法匹配到限制规则，从而通过了 和 检查。若攻击者能够影响由 AI 代理选定的路径，便可能遍历嵌套的仓库或 Obsidian 元数据，读取远程 URL 或嵌入的令牌，或者导致嵌套的 内容污染 索引。该问题已在 0.11.5 版本中修复。

CVSS 6.9 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
bitbonsai mcpvault < 0.11.5 affected
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I. Basic Information for CVE-2026-57442

Vulnerability Information
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Vulnerability Title
MCPVault: PathFilter restricted directories (.git/.obsidian/node_modules) only denied at vault root, not nested
Source: CVE Program / CVE List V5
Vulnerability Description
MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.5, PathFilter in src/pathfilter.ts uses root-anchored deny-list patterns, so nested .git, .obsidian, and node_modules path segments do not match the restriction and pass both isAllowed() and isAllowedForListing(). An attacker who influences a path selected by an AI agent can traverse nested repository or Obsidian metadata, read remote URLs or embedded tokens, or cause nested node_modules content to pollute the listAllTags index. This issue is fixed in version 0.11.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
bitbonsai mcpvault < 0.11.5 -

II. Public POCs for CVE-2026-57442

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III. Intelligence Information for CVE-2026-57442

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Patches & Fixes for CVE-2026-57442 (2)

Vendor Advisories for CVE-2026-57442 (1)

Other References for CVE-2026-57442 (1)

IV. Related Vulnerabilities

Same product: mcpvault
Same vendor: bitbonsai
Same weakness: CWE-22

V. Comments for CVE-2026-57442

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