github.com
https://github.com/denoland/deno CVE-2026-49401
HIGH
Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)
Record summary
CVE-2026-49401 has a selected CVSS score of 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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Jun 23, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
| CVE List | < 2.7.14 | affected | |
| GitHub Advisory | Before 2.7.14 · Fixed in 2.7.14 | affected |
References
3github.comConfirmation
https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9 nvd.nist.gov
https://nvd.nist.gov/vuln/detail/CVE-2026-49401