Is CVE-2026-34237 actively exploited?

CVE-2026-34237 has no public evidence of in-the-wild exploitation as of 2026-04-03.

What is the CVSS score for CVE-2026-34237?

CVE-2026-34237 has a CVSS score of 6.1 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-34237?

Patch guidance is available from lfprojects security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34237.

CVE-2026-34237 - remediation guidance & executive summary

Q: Which products are affected by CVE-2026-34237?

2 products: lfprojects mcp java sdk, lfprojects mcp java sdk.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-942

Metadata

Primary Vendor: LFPROJECTS
Published: 3/31/2026
Last Modified: 4/3/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-34237

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary