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CVE-2026-49291— mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call

Quick assessment

Affected
doobidoo mcp-memory-service
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

doobidoo mcp-memory-service是doobidoo个人开发者开源的一个模型上下文协议服务。 doobidoo mcp-memory-service 10.65.3之前版本存在授权问题漏洞，该漏洞源于HTTP MCP JSON-RPC端点 仅需要OAuth 范围，直接分发 到包含变更工具的处理程序，可能导致只读OAuth客户端调用 和 。

CVSS 8.1 · High EPSS 0.49% · P41

Affected Version Matrix 1

VendorProduct Version RangeStatus
doobidoo mcp-memory-service < 10.65.3 affected
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I. Basic Information for CVE-2026-49291

Vulnerability Information
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Vulnerability Title
mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
doobidoo mcp-memory-service 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
doobidoo mcp-memory-service是doobidoo个人开发者开源的一个模型上下文协议服务。 doobidoo mcp-memory-service 10.65.3之前版本存在授权问题漏洞，该漏洞源于HTTP MCP JSON-RPC端点`/mcp`仅需要OAuth `read`范围，直接分发`tools/call`到包含变更工具的处理程序，可能导致只读OAuth客户端调用`store_memory`和`delete_memory`。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
doobidoo mcp-memory-service < 10.65.3 -

II. Public POCs for CVE-2026-49291

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7002 chars
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III. Intelligence Information for CVE-2026-49291

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Vendor Advisories for CVE-2026-49291 (1)

Other References for CVE-2026-49291 (1)

IV. Related Vulnerabilities

Same product: mcp-memory-service
Same vendor: doobidoo
Same weakness: CWE-862

V. Comments for CVE-2026-49291

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