{"id":"CVE-2026-49291","summary":"mcp-memory-service: OAuth read-only clients can write and delete memories through MCP tools/call","details":"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.","aliases":["GHSA-2r68-g678-7qr3","PYSEC-2026-2622"],"modified":"2026-08-28T11:47:27.125089210Z","published":"2026-06-19T17:59:48.862Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49291.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://web.archive.org/web/20260508112116/https://github.com/doobidoo/mcp-memory-service/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49291.json"},{"type":"ADVISORY","url":"https://github.com/doobidoo/mcp-memory-service/security/advisories/GHSA-2r68-g678-7qr3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49291"},{"type":"PACKAGE","url":"https://pypi.org/project/mcp-memory-service/10.65.3"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/doobidoo/mcp-memory-service","events":[{"introduced":"0"},{"fixed":"0a04f0be15eece8d460183432dbd7a55386fa140"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"10.65.3"}],"source":"AFFECTED_FIELD"}}],"versions":["v10.65.1","v10.65.0","v10.64.2","v10.64.1","v10.64.0","v10.63.0","v10.62.0","v10.61.0","v10.60.2","v10.60.1","v10.60.0","v10.59.2","v10.59.1","v10.59.0","v10.58.0","v10.57.3","v10.57.2","v10.57.1","v10.57.0","v10.56.3","v10.56.2","v10.56.1","v10.56.0","v10.55.2","v10.55.1","v10.55.0","v10.54.0","v10.53.0","v10.52.0","v10.51.3","v10.51.2","v10.51.1","v10.51.0","v10.50.0","v10.49.4","v10.49.3","v10.49.2","v10.49.1","v10.49.0","v10.48.0","v10.47.2","v10.47.1","v10.47.0","v10.46.0","v10.45.1","v10.45.0","v10.44.0","v10.43.0","v10.42.1","v10.42.0","v10.41.0","v10.40.4","v10.40.3","v10.40.2","v10.40.1","v10.40.0","v10.39.1","v10.39.0","v10.38.4","v10.38.3","v10.38.2","v10.38.1","v10.38.0","v10.37.0","v10.36.8","v10.36.7","v10.36.6","v10.36.5","v10.36.4","v10.36.3","v10.36.2","v10.36.1","v10.36.0","v10.35.0","v10.34.0","v10.33.0","v10.32.0","v10.31.2","v10.31.1","v10.31.0","v10.30.0","v10.29.1","v10.29.0","v10.28.5","v10.28.4","v10.28.3","v10.28.2","v10.28.1","v10.28.0","v10.27.0","v10.26.9","v10.26.8","v10.26.7","v10.26.5","v10.26.4","v10.26.3","v10.26.2","v10.26.1","v10.26.0","v10.25.3","v10.25.2","v10.25.1","v10.25.0","v10.24.0","v10.23.0","v10.22.0","v10.21.1","v10.21.0","v10.20.6","v10.20.4","v10.20.2","v10.20.1","v10.20.0","v10.19.0","v10.18.3","v10.18.2","v10.18.1","v10.18.0","v10.17.16","v10.17.15","v10.17.13","v10.17.12","v10.17.11","v10.17.10","v10.17.9","v10.17.8","v10.17.7","v10.17.6","v10.17.5","v10.17.4","v10.17.3","v10.17.2","v10.17.0","v10.16.1","v10.16.0","v10.15.1","v10.15.0","v10.14.0","v10.13.2","v10.13.1","v10.13.0","v10.12.1","v10.12.0","v10.11.2","v10.11.1","v10.11.0","v10.10.6","v10.10.5","v10.10.4","v10.10.3","v10.10.2","v10.10.1","v10.10.0","v10.9.0","v10.8.0","v10.7.2","v10.7.1","v10.7.0","v10.6.1","v10.6.0","v10.5.1","v10.5.0","v10.4.6","v10.4.5","v10.4.4","v10.4.3","v10.4.2","v10.4.1","v10.4.0","v10.3.0","v10.2.1","v10.2.0","v10.1.2","v10.1.1","v10.1.0","v10.0.3","v10.0.2","v10.0.1","v10.0.0","v9.2.1","v9.2.0","v9.0.6","v9.0.5","v9.0.4","v9.0.3","v9.0.2","v9.0.1","v9.0.0","v8.76.0","v8.75.1","v8.75.0","v8.74.0","v8.73.0","v8.72.0","v8.71.0","v8.70.0","v8.69.0","v8.68.2","v8.68.1","v8.68.0","v8.67.0","v8.66.0","v8.65.0","v8.64.0","v8.63.1","v8.63.0","v8.62.13","v8.62.12","v8.62.11","v8.62.10","v8.62.9","v8.62.8","v8.62.7","v8.62.6","v8.62.5","v8.62.4","v8.62.3","v8.62.2","v8.62.1","v8.62.0","v8.61.2","v8.61.1","v8.61.0","v8.60.0","v8.59.0","v8.58.0","v8.57.1","v8.57.0","v8.56.0","v8.55.0","v8.54.4","v8.54.3","v8.54.2","v8.54.1","v8.54.0","v8.53.0","v8.52.2","v8.52.1","v8.52.0","v8.51.0","v8.50.1","v8.50.0","v8.49.0","v8.48.4","v8.48.3","v8.48.2","v8.48.1","v8.48.0","v8.47.1","v8.47.0","v8.46.3","v8.46.2","v8.46.1","v8.46.0","v8.45.3","v8.45.2","v8.45.1","v8.45.0","v8.44.0","v8.43.0","v8.42.1","v8.42.0","v8.41.2","v8.41.1","v8.41.0","v8.40.0","v8.39.1","v8.39.0","v8.38.1","v8.38.0","v8.37.0","v8.36.1","v8.36.0","v8.35.0","v8.34.0","v8.33.0","v8.32.0","v8.31.0","v8.30.0","v8.29.0","v8.28.1","v8.28.0","v8.27.2","v8.27.1","v8.27.0","v8.26.0","v8.25.2","v8.25.1","v8.25.0","v8.24.4","v8.24.3","v8.24.2","v8.24.1","v8.23.1","v8.23.0","v8.22.2","v8.22.1","v8.22.0","v8.21.0","v8.20.1","v8.20.0","v8.19.1","v8.19.0","v8.18.2","v8.18.1","v8.18.0","v8.14.0","v8.17.1","v8.17.0","v8.16.2","v8.16.1","v8.16.0","v8.15.1","v8.15.0","v8.14.2","v8.14.1","v8.13.5","v8.13.4","v8.13.3","v8.13.2","v8.13.1","v8.13.0","v8.12.1","v8.12.0","v8.11.0","v8.10.0","v8.9.0","v8.8.2","v8.8.1","v8.8.0","v8.7.0","v8.6.0","v8.5.14","v8.5.13","v8.5.12","v8.5.11","v8.5.10","v8.5.9","v8.5.8","v8.5.7","v8.5.6","v8.5.5","v8.5.4","v8.5.3","v8.5.2","v8.5.1","v8.5.0","v8.4.3","v8.4.2","v8.4.1","v8.4.0","v8.3.1","v8.3.0","v8.2.4","v7.5.2","v7.5.1","v6.22.1","v7.1.4","v7.1.3-main","v7.1.0","v7.0.0","v6.23.0","v6.22.0","v6.21.0","v6.20.1","v6.20.0","v6.19.0","v6.18.0","v6.17.2","v6.17.1","v6.17.0","v6.16.1","v6.16.0","v6.15.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