What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-30
• Weakness: CWE-22

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.

Affected products

• bitbonsai mcpvault: before 0.11.5

References

• https://github.com/bitbonsai/mcpvault/commit/0adb43901e1a08e85e14b42a8df2442fabc0b64a
• https://github.com/bitbonsai/mcpvault/commit/8795716b90d1c4090a82a58647e030763513f17e
• https://github.com/bitbonsai/mcpvault/issues/128
• https://github.com/bitbonsai/mcpvault/security/advisories/GHSA-9c83-rr99-vfwj
• https://github.com/bitbonsai/mcpvault/issues/128

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