CVE-2025-21620 — Deno's authorization headers not dropped when redirecting cross-origin
Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. When you send a request with the Authorization header to one domain, and the response asks to red…
Published: 2025-01-06 · CVSS: 7.5 · CVSS 3.1
Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. When you send a request with the Authorization header to one domain, and the response asks to redirect to a different domain, Deno'sfetch() redirect handling creates a follow-up redirect request that keeps the original Authorization header, leaking its content to that second domain. This vulnerability is fixed in 2.1.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7