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Medium, CVSS 6.9amended

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

CVE-2026-57442GHSA-9c83-rr99-vfwj

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@bitbonsai/mcpvault 0.11.5), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-57442: 0.19% estimated exploitation activity in the next 30 days; percentile 8.94 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

PathFilter's deny-list glob patterns are anchored, so .git, .obsidian, and nodemodules were only blocked at the vault root. Nested copies inside the vault (e.g. tools/cli/nodemodules/..., tools/somerepo/.git/config, a nested .obsidian/) were fully traversable via isAllowed/isAllowedForListing. Impact: a nested .git/config (remote URLs / embedded tokens) and nested .obsidian contents could be read, under the same prompt-injection threat model as GHSA-j99q-93c9-h869 (an attacker influences the path an agent reads). It also caused nested nodemodules to pollute the tag index (#128, the public symptom). Fixed in 0.11.5 by denying these restricted names at any path depth (matched case-insensitively as any path segment).

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-9c83-rr99-vfwj

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-9c83-rr99-vfwj

Agent brief

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# Patch Next advisory brief: CVE-2026-57442

Advisory: MCPVault: PathFilter restricted directories (.git/.obsidian/node_modules) only denied at vault root, not nested
IDs: CVE-2026-57442, GHSA-9c83-rr99-vfwj
Record: https://patchnext.com/advisories/cve-2026-57442 (revision 3, source checked 26 Oct 2026, 12:57 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @bitbonsai/mcpvault 0.11.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @bitbonsai/mcpvault: affected < 0.11.5; fixed in 0.11.5

## Suggested inspection (read-only)
- `npm ls @bitbonsai/mcpvault --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @bitbonsai/mcpvault.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-9c83-rr99-vfwj (OSV record GHSA-9c83-rr99-vfwj lists affected ranges: npm @bitbonsai/mcpvault >=0 <0.11.5 (fixed))
- Verified: https://github.com/advisories/GHSA-9c83-rr99-vfwj (GitHub-reviewed advisory GHSA-9c83-rr99-vfwj lists affected ranges: npm @bitbonsai/mcpvault >=0 <0.11.5)

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