{"id":"CVE-2026-35568","state":"PUBLISHED","title":"MCP Java-SDK has a DNS Rebinding Vulnerability","description":"MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to 1.0.0, the java-sdk contains a DNS rebinding vulnerability. This vulnerability allows an attacker to access a locally or network-private java-sdk MCP server via a victims browser that is either local, or network adjacent. This allows an attacker to make any tool call to the server as if they were a locally running MCP connected AI agent. This vulnerability is fixed in 1.0.0.","publishedAt":"2026-04-07T21:06:10.438Z","updatedAt":"2026-04-08T15:43:22.962Z","severity":{"score":7.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["modelcontextprotocol java-sdk"],"affected":[{"vendor":"modelcontextprotocol","product":"java-sdk","versions":[{"version":"< 1.0.0","status":"affected"}]}],"references":["https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468","https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35568.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35568","state":"PUBLISHED","datePublished":"2026-04-07T21:06:10.438Z","dateUpdated":"2026-04-08T15:43:22.962Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-03T20:09:02.826Z"},"containers":{"cna":{"title":"MCP Java-SDK has a DNS Rebinding Vulnerability","descriptions":[{"lang":"en","value":"MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to 1.0.0, the java-sdk contains a DNS rebinding vulnerability. This vulnerability allows an attacker to access a locally or network-private java-sdk MCP server via a victims browser that is either local, or network adjacent. This allows an attacker to make any tool call to the server as if they were a locally running MCP connected AI agent. This vulnerability is fixed in 1.0.0."}],"affected":[{"vendor":"modelcontextprotocol","product":"java-sdk","versions":[{"version":"< 1.0.0","status":"affected"}]}],"references":[{"url":"https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468","name":"https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0","name":"https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-07T21:06:10.438Z"},"source":{"advisory":"GHSA-8jxr-pr72-r468","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-08T15:43:13.122284Z","id":"CVE-2026-35568","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-08T15:43:22.962Z"}}]}}}