CVE-2026-49401

[CVE catalog]

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

High · CVSS 7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

Published

Jun 23, 2026, 6:18:03 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.20% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "deno",
      "ecosystem": "cpe",
      "fixed_version": "2.7.14",
      "provider_source": "nvd"
    },
    {
      "name": "deno",
      "ranges": [
        {
          "fixed": "2.7.14",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "provider_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49401",
      "fixed_version": "2.7.14",
      "provider_source": "nvd",
      "provider_record_id": "NVD-CVE-2026-49401",
      "provider_updated_at": "2026-10-25T23:10:00.167"
    }
  ]
}