CVE-2026-49291
Published:June 19, 2026
Updated:August 04, 2026
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.
Affected Packages
mcp-memory-service (PYTHON):
Affected version(s) >=8.24.0 <10.65.3Fix Suggestion:
Update to version 10.65.3mcp-memory-service (PYTHON):
Affected version(s) >=8.24.0 <10.65.3Fix Suggestion:
Update to version 10.65.3Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Missing Authorization
EPSS
Base Score:
0.49