CVE-2026-25536
MCP TypeScript SDK
- Severity
- High
- Published
- February 4, 2026
- Last modified
- July 15, 2026
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 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
References
- github.comIssue TrackingVendor Advisory
- github.comIssue TrackingVendor Advisory
- github.comVendor Advisory
- access.redhat.com
- access.redhat.com
- bugzilla.redhat.com
- security.access.redhat.com
Listed in
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