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Vulnerability record · CVE-2026-50027 · published 14 August 2026

CVE-2026-50027: Missing authentication for critical function vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.96% · top 40.1% CWE-306 · Missing authentication for critical function Deferred
9.8CVSS 3.1 base score
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
16 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/advisories/GHSA-84hp-mqvj-3p8h
https://pypi.org/project/mcp-memory-service
https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service

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Source: NIST National Vulnerability Database (record CVE-2026-50027), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.