CVE-2026-49401

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 v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 4.7

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Deno es un entorno de ejecución de JavaScript, TypeScript y WebAssembly. Antes de la versión 2.7.14, el sistema de permisos de Deno aplicaba restricciones de sistema de archivos y ejecución comparando la ruta solicitada con la ruta proporcionada a --deny-read, --deny-write, --deny-run o --deny-ffi. En macOS, esa comparación se realizaba a nivel de bytes sin procesar, mientras que el sistema de archivos APFS trata diferentes escrituras Unicode del mismo nombre como el mismo archivo. Eso significa que un programa podría acceder a una ruta denegada escribiéndola de manera diferente a la regla de denegación. Esta vulnerabilidad está corregida en la versión 2.7.14.

Information

Published : 2026-06-23 18:18

Updated : 2026-10-25 23:10

NVD link : CVE-2026-49401

Mitre link : CVE-2026-49401

CVE.ORG link : CVE-2026-49401

JSON object : View

Products Affected

deno

deno

apple

macos

CWE

CWE-41

Improper Resolution of Path Equivalence

CWE-176

Improper Handling of Unicode Encoding

{"id": "CVE-2026-49401", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49401", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-23T17:35:46.438186Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 2.0}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 2.0}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "denoland", "product": "deno", "versions": [{"status": "affected", "version": "< 2.7.14"}]}]}], "published": "2026-06-23T18:18:03.033", "references": [{"url": "https://github.com/denoland/deno/security/advisories/GHSA-8xpq-cjcf-3wh9", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-41"}, {"lang": "en", "value": "CWE-176"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Deno es un entorno de ejecuci\u00f3n de JavaScript, TypeScript y WebAssembly. Antes de la versi\u00f3n 2.7.14, el sistema de permisos de Deno aplicaba restricciones de sistema de archivos y ejecuci\u00f3n comparando la ruta solicitada con la ruta proporcionada a --deny-read, --deny-write, --deny-run o --deny-ffi. En macOS, esa comparaci\u00f3n se realizaba a nivel de bytes sin procesar, mientras que el sistema de archivos APFS trata diferentes escrituras Unicode del mismo nombre como el mismo archivo. Eso significa que un programa podr\u00eda acceder a una ruta denegada escribi\u00e9ndola de manera diferente a la regla de denegaci\u00f3n. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 2.7.14."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6D9303E8-C864-4B87-85A9-54A72C7DADEA", "versionEndExcluding": "2.7.14"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security-advisories@github.com"}