gcdRadar
archive/Patch now/AIR-2026-0120
closedclosed 15 Sep 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-57442: Path restriction bypass vulnerability in MCPVault

MCPVault

A path filter vulnerability in the MCPVault Model Context Protocol server permits traversal into nested repository or Obsidian metadata directories. An attacker influencing AI agent paths can read restricted files or tokens.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.9
EPSS
<0.01 · top 91% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
15 Sep 2026
last update
15 Sep 2026
CVE ids
CVE-2026-57442other records

Timeline · 1

  1. 15 Sep 2026CVE-2026-57442: MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault.

Sources · 1

Advisories and databases

  1. 2026-09-15
    CVE-2026-57442: MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-57442

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
path-traversalmcp
dates
happened 15 Sep 2026 · first reported 15 Sep 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-57442: Path restriction bypass vulnerability in MCPVault

https://gcdradar.vercel.app/incidents/cve-2026-57442-path-restriction-bypass-vulnerability-in-mcpv · AIR-2026-0120 · closed 2026-09-15

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-15
- AI role: Attack on AI
- Products: MCPVault
- CVE ids: CVE-2026-57442
- CVSS: 6.9

## Summary

A path filter vulnerability in the MCPVault Model Context Protocol server permits traversal into nested repository or Obsidian metadata directories. An attacker influencing AI agent paths can read restricted files or tokens.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-09-15: CVE-2026-57442: MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. (https://nvd.nist.gov/vuln/detail/CVE-2026-57442)

## Sources

- 2026-09-15 NVD: CVE-2026-57442: MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. https://nvd.nist.gov/vuln/detail/CVE-2026-57442

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

Related

  1. closed6.9
    MCP servers & tools CVE-2026-57441: MCPVault contains path filter bypass vulnerability

    Patch now · Disclosed · since 15 Sep 2026 · CVE-2026-57441

    AI
  2. closed7.2
    Portkey AI Gateway Portkey AI Gateway Server-Side Request Forgery Vulnerability

    Patch now · Disclosed · since 14 Oct 2026 · CVE-2026-110719

    AI
  3. closed7.5
    MCP SDKs Model Context Protocol Python SDK Unbounded Session Accumulation Flaw

    Patch now · Disclosed · since 14 Oct 2026 · updated 15 Oct 2026 · CVE-2026-59951

    AI
  4. closed7.5
    MCP SDKs Model Context Protocol Java SDK Unbounded Request Body Vulnerability

    Patch now · Disclosed · since 14 Oct 2026 · CVE-2026-108395

    AI
  5. closed7.5
    MCP SDKs Model Context Protocol Python SDK Unbounded HTTP Body Memory Buffer Vulnerability

    Patch now · Disclosed · since 14 Oct 2026 · CVE-2026-109527

    AI
  6. closed6.3
    ComfyUI + custom nodes CVE-2026-108962: Code injection in comfyui_segment_anything

    Patch now · Disclosed · since 13 Oct 2026 · CVE-2026-108962

    AI