---
id: CVE-2026-50027
title: mcp-memory-service is a semantic memory layer for AI applications
summary: >-
  mcp-memory-service is a semantic memory layer for AI applications. Prior to
  10.67.1, all HTTP routes under /api/documents/* in mcp-memory-service are
  served without any authentication dependency, even when the server is
  configured with a…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
vendor: mcp-memory-service
product: mcp-memory-service
affected:
  - mcp-memory-service < 10.67.1
patched:
  - mcp-memory-service 10.67.1
published: '2026-08-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T13:42:43.447'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50027'
references:
  - url: 'https://github.com/advisories/GHSA-84hp-mqvj-3p8h'
    label: security-advisories@github.com
  - url: 'https://pypi.org/project/mcp-memory-service'
    label: security-advisories@github.com
  - url: >-
      https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service
    label: security-advisories@github.com
  - url: >-
      https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-84hp-mqvj-3p8h
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00959
epssPercentile: 0.59874
ecosystem: pip
ingestedAt: '2026-07-02T15:38:25.163Z'
---

## Overview

mcp-memory-service is a semantic memory layer for AI applications. Prior to 10.67.1, all HTTP routes under /api/documents/* in mcp-memory-service are served without any authentication dependency, even when the server is configured with an API key (MCP_API_KEY) or OAuth. An unauthenticated remote attacker can upload arbitrary content into the memory store (write), retrieve stored document content (read), and permanently delete memories belonging to authenticated users (delete) — all without supplying any credentials. The /api/memories counterpart correctly enforces authentication, making this an inconsistent and exploitable authentication boundary. This vulnerability is fixed in 10.67.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-50027)

Affected packages:

- `mcp-memory-service < 10.67.1`

Patched in:

- `mcp-memory-service 10.67.1`

Source: https://github.com/advisories/GHSA-84hp-mqvj-3p8h