high8.1
CVE-2026-49291
mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | mcp-memory-service | <= 10.65.1 | 10.65.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-2r68-g678-7qr3
- https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3
- https://nvd.nist.gov/vuln/detail/CVE-2026-49291
- https://pypi.org/project/mcp-memory-service/10.65.3
- https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service
- https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/