CVE-2026-81100Timescale tiger-gh-mcp-server DNS Rebinding via Disabled Host Header Allow-List
Updated under an hour ago ()
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It affects timescale tiger-gh-mcp-server. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
timescale tiger-gh-mcp-server timescale:tiger_gh_mcp_server (from the name) | e559b57b57cf61277525ec96bbf1edcf01b16a21 not affected; before e559b57b57cf61277525ec96bbf1edcf01b16a21 | CNA record |
References
- https://github.com/timescale/tiger-gh-mcp-serverproduct
- https://github.com/timescale/tiger-gh-mcp-server/pull/36issue-tracking, patch
- https://www.vulncheck.com/advisories/timescale-tiger-gh-mcp-server-dns-rebinding-via-disabled-host-header-allow-listthird-party-advisory
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.