gcdRadar
archive/Patch now/AIR-2026-1209
closedclosed 20 Jul 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-46555: WhatsApp MCP Server Unauthenticated API Vulnerability

WhatsApp MCP Server

The WhatsApp MCP server features an unauthenticated local HTTP API and lacks path validation, allowing local processes to send arbitrary messages and read files. A newer version was released to address the security controls.

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
7.7
EPSS
<0.01 · top 89% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
20 Jul 2026
last update
20 Jul 2026
CVE ids
CVE-2026-46555other records

Timeline · 1

  1. 20 Jul 2026CVE-2026-46555: WhatsApp MCP Server is a Model Context Protocol (MCP) server for WhatsApp, enabling Claude to read and send WhatsApp messages.

Sources · 1

Advisories and databases

  1. 2026-07-20
    CVE-2026-46555: WhatsApp MCP Server is a Model Context Protocol (MCP) server for WhatsApp, enabling Claude to read and send WhatsApp messages.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-46555

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
mcpunauthenticated-api
dates
happened 20 Jul 2026 · first reported 20 Jul 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 10:04Z · updated 2026-10-18 10:04Z

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-2026-46555: WhatsApp MCP Server Unauthenticated API Vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-46555-whatsapp-mcp-server-unauthenticated-api-vulne · AIR-2026-1209 · closed 2026-07-20

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-07-20
- AI role: Attack on AI
- Products: WhatsApp MCP Server
- CVE ids: CVE-2026-46555
- CVSS: 7.7

## Summary

The WhatsApp MCP server features an unauthenticated local HTTP API and lacks path validation, allowing local processes to send arbitrary messages and read files. A newer version was released to address the security controls.

## What to do

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

## Latest updates

- 2026-07-20: CVE-2026-46555: WhatsApp MCP Server is a Model Context Protocol (MCP) server for WhatsApp, enabling Claude to read and send WhatsApp messages. (https://nvd.nist.gov/vuln/detail/CVE-2026-46555)

## Sources

- 2026-07-20 NVD: CVE-2026-46555: WhatsApp MCP Server is a Model Context Protocol (MCP) server for WhatsApp, enabling Claude to read and send WhatsApp messages. https://nvd.nist.gov/vuln/detail/CVE-2026-46555

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

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