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Vulnerability record · CVE-2026-49291 · published 19 June 2026

CVE-2026-49291: Missing authorization vulnerability

mcp-memory-service is a semantic memory layer for AI applications. Prior to version 10.65.3, the HTTP MCP JSON-RPC endpoint at `/mcp` requires only OAuth `read` scope for all requests, then dispatches `tools/call` directly to handlers that include mutating tools. A read-only OAuth client can call `store_memory` and `delete_memory` through MCP even though the corresponding REST endpoints require `write` scope. Version 10.65.3 patches the issue.

8.1 CVSS 3.1 High EPSS 0.49% · top 60.4% CWE-862 · Missing authorization Deferred
8.1CVSS 3.1 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
23 Jun 2026Last modified by NVD

Description

mcp-memory-service is a semantic memory layer for AI applications. Prior to version 10.65.3, the HTTP MCP JSON-RPC endpoint at `/mcp` requires only OAuth `read` scope for all requests, then dispatches `tools/call` directly to handlers that include mutating tools. A read-only OAuth client can call `store_memory` and `delete_memory` through MCP even though the corresponding REST endpoints require `write` scope. Version 10.65.3 patches the issue.

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

References

LinkTags
https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3
https://pypi.org/project/mcp-memory-service/10.65.3
https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/

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Source: NIST National Vulnerability Database (record CVE-2026-49291), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.