Medium 6.8Published Aug 27, 2026

CVE-2026-81099Timescale tiger-slack DNS Rebinding via Disabled Host Header Allow-List

Updated under an hour ago (2026-10-19 08:50 UTC)

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It affects timescale tiger-slack. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for timescale tiger-slack

Exploited in the last 30 days

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.

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

Affected products

timescale tiger-slack timescale:tiger_slack (from the name)	23faf7ee7e7f73e5ea4f67e627c1aca94bba1f09 not affected; before 23faf7ee7e7f73e5ea4f67e627c1aca94bba1f09	CNA record

References

https://github.com/timescale/tiger-slackproduct
https://github.com/timescale/tiger-slack/pull/146issue-tracking, patch
https://www.vulncheck.com/advisories/timescale-tiger-slack-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.