{"id":"CVE-2026-108395","revision":null,"records":[{"revision":"b80050cd9b024a328bac4006dbf60161","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-108395","aliases":[],"title":"Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies","description":"The Model Context Protocol Java SDK is the official Java SDK for Model Context Protocol servers and clients. From version 0.8.0 through 0.12.0 in the io.modelcontextprotocol.sdk:mcp artifact, from 0.13.0 through 0.18.3 and 1.0.0 through 1.1.3 in io.modelcontextprotocol.sdk:mcp-core, and from mcp-core 2.0.0-M1 through 2.0.0, the Servlet-based SSE, Streamable HTTP, and Stateless server transports read an HTTP request body into memory without enforcing a maximum size. An unauthenticated remote client able to reach an affected transport can stream an arbitrarily large POST body, including with chunked transfer encoding, until the Java process exhausts its heap and becomes unavailable. Authentication, Origin or Host validation, or an upstream request-size limit can reject the request before the vulnerable read. The maintained mcp-core lines are fixed in versions 0.18.4, 1.1.4, and 2.0.1.","state":0,"publishedAt":"2026-10-14T17:46:23.76+00:00","modifiedAt":"2026-10-14T19:29:00.613+00:00","affected":[{"ecosystem":"Vendor product","name":"io.modelcontextprotocol.sdk:mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"modelcontextprotocol\",\n                    \"product\": \"io.modelcontextprotocol.sdk:mcp\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.8.0, < 0.13.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"io.modelcontextprotocol.sdk:mcp-core","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"modelcontextprotocol\",\n                    \"product\": \"io.modelcontextprotocol.sdk:mcp-core\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.13.0, < 0.18.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.0.0, < 1.1.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 2.0.0-M1, < 2.0.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-4x8c-5vv7-973f","https://github.com/modelcontextprotocol/java-sdk/commit/1499df22c7023aa257223143a5dcf5b1db7ef80d","https://github.com/modelcontextprotocol/java-sdk/commit/6a41dedaa0625551582d8247e5a4d78eae1131b2","https://github.com/modelcontextprotocol/java-sdk/commit/8c0fdd1b1f76adba3ce7945d29f73fa2ddc66598","https://github.com/modelcontextprotocol/java-sdk/commit/9e4d5fa827b6ba69457f5fd93573184789528efa","https://github.com/modelcontextprotocol/java-sdk/releases/tag/v0.18.4","https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.1.4","https://github.com/modelcontextprotocol/java-sdk/releases/tag/v2.0.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-108395","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-108395","identifiers":["CVE-2026-108395"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-10T00:04:20.9434546+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-10T00:04:20.9434546+00:00","lastSuccessAt":"2026-11-10T00:04:21.6223341+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:21.622335+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-28cfe0e9a7fd540693c3c003e82e8794f6d50787cb7c9866f49d79161db1199f","complete":true,"records":421738,"lastAttemptAt":"2026-11-10T00:02:15.9105874+00:00","lastSuccessAt":"2026-11-10T00:02:15.7728836+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:02:15.9105874+00:00","snapshotPublishedAt":"2026-11-09T23:23:26+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-b783d97e3b134219921bc73a4eb925c2","complete":false,"records":13689,"lastAttemptAt":"2026-11-10T00:15:27.4101652+00:00","lastSuccessAt":"2026-11-10T00:15:27.4819113+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:15:27.4819113+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-10T00:04:20.9434546+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T00:04:20.9434546+00:00","lastSuccessAt":"2026-11-10T00:04:21.6231234+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:21.6231235+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-46931e0d84a04da7b4a608d083ac3d63","complete":false,"records":13695,"lastAttemptAt":"2026-11-10T00:04:49.7283608+00:00","lastSuccessAt":"2026-11-10T00:04:49.725+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:49.725+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13704,"expectedIdentifiers":13742,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-cdffb4589856378aa42e8d1bd4a6c74e27a180d8160bf764c44715ef760f0a62","complete":true,"records":9932,"lastAttemptAt":"2026-11-10T00:04:20.2100924+00:00","lastSuccessAt":"2026-11-10T00:04:19.8260565+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:20.2100924+00:00","snapshotPublishedAt":"2026-11-09T23:48:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-26503967ae4379db8f374089589d6e03fb15bd31f820c9e992aaf93840c2236c","complete":true,"records":1971,"lastAttemptAt":"2026-11-10T00:02:15.9827084+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:02:15.9827084+00:00","snapshotPublishedAt":"2026-11-09T20:18:18+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-10T00:04:20.8155249+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:20.8155249+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-0238b66eb8569b8ca6bfb00e5ba7ca79562b7b754d90d8771d19caf3b72b4f1c","complete":true,"records":231580,"lastAttemptAt":"2026-11-10T00:04:10.424408+00:00","lastSuccessAt":"2026-11-10T00:04:09.9885069+00:00","error":null,"lastVerifiedAt":"2026-11-10T00:04:10.424408+00:00","snapshotPublishedAt":"2026-11-09T23:48:05+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}