Review reviewHigh

CVE-2026-25536

modelcontextprotocol typescript-sdk, Red Hat Ansible Automation Platform 2.6, mcp typescript sdk

MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.10.0 to 1.25.3, cross-client response data leak when a single McpServer/Server and transport instance is reused across multiple client connections, most commonly in stateless StreamableHTTPServerTransport deployments. This issue has been patched in version 1.26.0.

CVSS: 7.1
EPSS: 0.27%
CISA KEV: Not listed
Published: 2026.02.05

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.27%

Technical severityCVSS 7.1

Vulnerability overview

Affected product and versions

Product: modelcontextprotocol typescript-sdk, Red Hat Ansible Automation Platform 2.6, mcp typescript sdk
Affected versions: >= >= 1.10.0, < 1.26.0, >= 1.10.0 < 1.26.0
Fixed versions: 1.26.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that modelcontextprotocol typescript-sdk, Red Hat Ansible Automation Platform 2.6, mcp typescript sdk and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CWE: CWE-362, CWE-367