Security Advisory

CVE-2026-49401

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-23 17:22:32

Last updated 2026-06-23 17:35:51

Assigner GitHub_M

CVSS score 7.3

State PUBLISHED

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.

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