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CVE-2026-35568

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:74ffa8d3306895708ea33dc383c1d123181592e174f74369d0b01b3858e36539
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"java-sdk","vendor":"modelcontextprotocol","versions":[{"status":"affected","version":"< 1.0.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b495c133500d6187ddb97920b67004840a0d635db5afd33865ba66a7961481b7 · sha256:2a094ec4f70d43b2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.6,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","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","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b495c133500d6187ddb97920b67004840a0d635db5afd33865ba66a7961481b7 · sha256:2a094ec4f70d43b2… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b495c133500d6187ddb97920b67004840a0d635db5afd33865ba66a7961481b7 · sha256:2a094ec4f70d43b2… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0","tags":["x_refsource_MISC"],"url":"https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b495c133500d6187ddb97920b67004840a0d635db5afd33865ba66a7961481b7 · sha256:2a094ec4f70d43b2… · /containers/cna/references/1
{"name":"https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468","tags":["x_refsource_CONFIRM"],"url":"https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b495c133500d6187ddb97920b67004840a0d635db5afd33865ba66a7961481b7 · sha256:2a094ec4f70d43b2… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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