{"apiVersion":"1.0","identifier":"CVE-2026-81099","description":"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.","publishedAt":"2026-08-27T17:20:52","lastModifiedAt":"2026-08-27T20:18:49","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81099","cvssScore":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","epssProbability":0.0016,"riskScore":0.69,"affectedProduct":"tiger-slack","affectedVersions":"unknown","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-81099","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-81099","en":"https://www.redsauce.net/en/cves/CVE-2026-81099","fr":"https://www.redsauce.net/fr/cves/CVE-2026-81099","pt":"https://www.redsauce.net/pt/cves/CVE-2026-81099","de":"https://www.redsauce.net/de/cves/CVE-2026-81099","sk":"https://www.redsauce.net/sk/cves/CVE-2026-81099","el":"https://www.redsauce.net/el/cves/CVE-2026-81099"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-81099"}}