CVE-2026-49401 — Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested pa…
Published: 2026-06-23 · CVSS: 7.3 · CVSS 3.1
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.14, Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different Unicode spellings of the same name as the same file. That means a program could reach a denied path by spelling it differently than the deny rule. This vulnerability is fixed in 2.7.14.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7