tiger-gh-mcp-server started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted a request whatever host it named, making the locally reachable GitHub MCP endpoint drivable from a page in a visitor's browser that pointed a name it controlled at the bound address. The fix passes the option explicitly alongside a dependency update; the update alone would not have closed it. The repository has published no release that brackets the fix, so the affected boundary is the commit preceding it.
History

Sat, 29 Aug 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 28 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Timescale
Timescale tiger-gh-mcp-server
Vendors & Products Timescale
Timescale tiger-gh-mcp-server

Thu, 27 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description tiger-gh-mcp-server started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted a request whatever host it named, making the locally reachable GitHub MCP endpoint drivable from a page in a visitor's browser that pointed a name it controlled at the bound address. The fix passes the option explicitly alongside a dependency update; the update alone would not have closed it. The repository has published no release that brackets the fix, so the affected boundary is the commit preceding it.
Title Timescale tiger-gh-mcp-server DNS Rebinding via Disabled Host Header Allow-List
Weaknesses CWE-346
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-08-27T14:50:39.728Z

Updated: 2026-08-29T11:48:13.548Z

Reserved: 2026-08-26T16:00:33.768Z

Link: CVE-2026-81100

cve-icon Vulnrichment

Updated: 2026-08-29T03:01:18.937Z

cve-icon NVD

Status : Received

Published: 2026-08-27T17:20:52.620

Modified: 2026-08-29T04:18:07.003

Link: CVE-2026-81100

cve-icon Redhat

No data.