CVE-2026-49401
Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)
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.
INFO
Published Date :
June 23, 2026, 5:22 p.m.
Last Modified :
June 23, 2026, 5:22 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-49401
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Deno to version 2.7.14 or later.
- Verify filesystem access controls function correctly.
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CVE-2026-49401 vulnerability anywhere in the article.