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High severity7.3GHSA Advisory· Published Jun 23, 2026· Updated Jun 26, 2026

CVE-2026-49401

CVE-2026-49401

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
denocrates.io
< 2.7.142.7.14

Affected products

2
  • Denoland/Deno2 versions
    cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*range: <2.7.14
    • (no CPE)range: <= 2.7.13

Patches

Vulnerability mechanics

References

3

News mentions

1