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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
denoland / deno	affected < 2.7.14

CWE

CWE-41, CWE-176

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.