CVE-2026-25536MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients.
Updated under an hour ago ()
Does this affect you?
It affects lfprojects mcp_typescript_sdk. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- Weakness (CWE)
- CWE-362, CWE-367
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
lfprojects mcp_typescript_sdk lfprojects:mcp_typescript_sdk | from 1.10.0 before 1.26.0 | NVD |
References
- https://github.com/modelcontextprotocol/typescript-sdk/issues/204issue-tracking, vendor-advisory
- https://github.com/modelcontextprotocol/typescript-sdk/issues/243issue-tracking, vendor-advisory
- https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-345p-7cg4-v4c7mitigation, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3960
- https://access.redhat.com/security/cve/CVE-2026-25536
- https://bugzilla.redhat.com/show_bug.cgi?id=2436937
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25536.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.