Vulnerability Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.0, the Node.js compatibility TCP path checked the permission against the original hostname string before resolution and then did not re-check after resolution. A caller could therefore pass a numeric alias of an IP address (for example the decimal integer 2130706433 or the hex form 0x7f000001, both of which resolve to 127.0.0.1) and reach the denied destination through node:net.connect or node:http.request's { host, port } options form. This vulnerability is fixed in 2.8.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Deno | Deno | >= 2.7.14, < 2.8.0 |
Related Weaknesses (CWE)
References
- https://github.com/denoland/deno/security/advisories/GHSA-v8fw-85r8-5m23ExploitMitigationThird Party Advisory
- https://github.com/denoland/deno/security/advisories/GHSA-v8fw-85r8-5m23ExploitMitigationThird Party Advisory
FAQ
What is CVE-2026-49411?
CVE-2026-49411 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.0, the Node.js compatibility TCP path checked the permission against the original hostname string before resolution and then did...
How severe is CVE-2026-49411?
CVE-2026-49411 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49411?
Check the references section above for vendor advisories and patch information. Affected products include: Deno Deno.