CVE-2026-49401 – Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)

CVE ID :CVE-2026-49401

Published : June 23, 2026, 5:22 p.m. | 21 minutes ago

Description :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.

Severity: 0.0 | NA

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