CVE-2026-49401 | Deno is a JavaScript, TypeScript, and WebAssembly runtime. P… | CVSS 7.3 HIGH

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.

Metadata

CVE ID: CVE-2026-49401
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-29 19:08 UTC
Published: 2026-06-23 17:22 UTC
Last updated: 2026-06-23 17:35 UTC
Primary CWE: CWE-41
CWE-41: Improper Resolution of Path Equivalence
Vendor / Product: denoland / deno
Sources: cve.org · NVD

Severity & Metrics

7.3 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
denoland	deno	—	< 2.7.14

Weakness (CWE)

CWE	Source	Description
CWE-176	cna	CWE-176: Improper Handling of Unicode Encoding
CWE-41	cna	CWE-41: Improper Resolution of Path Equivalence

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.3	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

References (1)

https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9 https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9