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NVD Vulnerability Details :
CVE-2026-34237
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-31 Mar, 2026 | 16:16
Updated At-03 Apr, 2026 | 14:29

MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to versions 1.0.1 and 1.1.1, there is a hardcoded wildcard CORS vulnerability. This issue has been patched in versions 1.0.1 and 1.1.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.1MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CPE Matches
lfprojects
lfprojects
>>mcp_java_sdk>>Versions before 1.0.1(exclusive)
cpe:2.3:a:lfprojects:mcp_java_sdk:*:*:*:*:*:*:*:*
lfprojects
lfprojects
>>mcp_java_sdk>>1.1.0
cpe:2.3:a:lfprojects:mcp_java_sdk:1.1.0:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-942Primarysecurity-advisories@github.com
CWE ID: CWE-942
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/modelcontextprotocol/java-sdk/blob/main/mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletSseServerTransportProvider.java#L289security-advisories@github.com
Patch
https://github.com/modelcontextprotocol/java-sdk/blob/main/mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStreamableServerTransportProvider.java#L525security-advisories@github.com
Patch
https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-hv2w-8mjj-jw22security-advisories@github.com
Mitigation
Vendor Advisory
Hyperlink: https://github.com/modelcontextprotocol/java-sdk/blob/main/mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletSseServerTransportProvider.java#L289
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/modelcontextprotocol/java-sdk/blob/main/mcp-core/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStreamableServerTransportProvider.java#L525
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-hv2w-8mjj-jw22
Source: security-advisories@github.com
Resource:
Mitigation
Vendor Advisory
Change History
0Changes found
Details not found