by Kastro
Paper/Archive/CVE-2026-50027

CVE-2026-50027

doobidoo mcp-memory-service — mcp-memory-service: Missing Authentication on Document API Endpoints Allows Unauthenticated Memory Read/Write/Delete

EPSS 1.0%CVSS 9.8
critical.is priorityof 100
42
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 61.5.615 × 2012.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
mcp-memory-service< 10.67.1–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refweb.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-servicerefgithub.com/advisories/GHSA-84hp-mqvj-3p8hrefpypi.org/project/mcp-memory-service