CVE-2026-49291
High
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.
SeverityHigh
CVSS8.1
Exploit probability—
ProductMcp-memory-service
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- mcp-memory-service10.65.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mcp-memory-servicePyPI | v < 10.65.3 | 10.65.3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.