CVE-2026-49411
Deno Node TCPWrap numeric hostname aliases bypass --deny-net resolved-IP deny checks
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.
INFO
Published Date :
June 23, 2026, 5:18 p.m.
Last Modified :
June 23, 2026, 5:18 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-49411
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Deno to version 2.8.0 or later.
- Ensure permissions are checked after hostname resolution.
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CVE-2026-49411 vulnerability anywhere in the article.