CVE-2026-49291CWE-862

mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call

High · published June 19, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
41.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00488 · 41.1th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-06-19T17:59Z
EPSS history
Timeline
  • 19 JUN 17:59Z
    mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call
    cvelistv5