{"data":{"id":"0671587c-9f82-4369-9be1-f8bb63a20ed1","title":"GHSA-j975-95f5-7wqh: MCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service","summary":"The MCP Python SDK's streamable HTTP transport has an unhandled exception. A client that deliberately triggers an exception after establishing a streamable HTTP session can cause an uncaught ClosedResourceError on the server. The server then crashes and needs a restart to restore service. Impact depends on deployment conditions and any infrastructure-level resilience measures.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-j975-95f5-7wqh","publishedAt":"2025-07-04T22:06:31.000Z","cveId":"CVE-2025-53365","cweIds":["CWE-248"],"cvssScore":null,"cvssSeverity":"high","severity":"high","attackType":["denial_of_service"],"issueType":"vulnerability","affectedPackages":["mcp@< 1.10.0 (fixed: 1.10.0)"],"affectedPackageNames":["mcp"],"affectedPackageRefs":["pypi:mcp"],"affectedVendors":[],"affectedVendorsRaw":["MCP Python SDK"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.00419,"epssCheckedAt":"2026-10-10T04:57:13.850Z","kevDateAdded":null,"advisoryAliases":["GHSA-j975-95f5-7wqh"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":true,"disclosureDate":"2025-07-04T22:06:31.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["availability"],"aiComponentTargeted":"api","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}