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TI-2026-56061 Aliases CVE-2026-81099GHSA-p943-9hp2-h27q

Timescale tiger-slack DNS Rebinding via Disabled Host Header Allow-List

Priority LOW 35CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-346.

Summary

tiger-slack started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. mcp/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, and a page in a browser could point a name it controlled at the address the server was bound to and drive the locally reachable Slack MCP server through the visitor's browser. The fix passes the option explicitly alongside a dependency update; the update alone would not have closed it. The repository publishes no release that brackets the fix, so the affected boundary is the commit preceding it.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00216 12th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81099
  2. 2026-10-03 Alias added: GHSA-p943-9hp2-h27q

References

Patch 1

Other 1

  • TI-2025-32594 pgai secrets exfiltration via `pull_request_target` CVSS 3.1CRITICAL 9.1
  • TI-2023-10611 TimescaleDB has incorrect access control CVSS 3.1HIGH 8.8
  • TI-2026-23232 TimescaleDB uses untrusted search path during extension upgrade CVSS 3.1HIGH 8.8
  • TI-2022-08073 Timescale TimescaleDB 1.x and 2.x before 2.5.2 may allow privilege escalation during… CVSS 3.1HIGH 8.0
  • TI-2026-80454 Type confusion in Timescale pgvectorscale DiskANN indexes CVSS 4.0HIGH 7.7
  • TI-2026-56062 Timescale tiger-gh-mcp-server DNS Rebinding via Disabled Host Header Allow-List CVSS 4.0HIGH 7.6
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences