Vulnerability details
CVE-2026-49401
denoland deno
Deno Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)
CVSS 3.1
7.3High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| denoland | deno | < 2.7.14 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9 x_refsource_CONFIRM
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Details
- Published
- 2026-06-23
- Last updated
- 2026-07-31
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.19%
Probability of exploitation in 30 days
9.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-41Improper Resolution of Path Equivalence
- CWE-176Improper Handling of Unicode Encoding