CVE-2026-49406

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.12, when Deno was run in BYONM mode (nodeModulesDir: "manual"), the module resolver did not validate that a package's resolved entrypoint stayed within its node_modules/<pkg>/ directory. A malicious package.json whose main field contained .. segments was able to resolve to an arbitrary path on disk, and the resolver then read that file without consulting the --allow-read allowlist. This let a require("evil-pkg") call return the contents of a file that a direct Deno.readTextFileSync(...) call would have been blocked from reading. This vulnerability is fixed in 2.7.12.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q	Exploit Mitigation Vendor Advisory
https://github.com/denoland/deno/security/advisories/GHSA-968w-xfqw-vp9q	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-06-23 18:18

Updated : 2026-06-26 17:29

NVD link : CVE-2026-49406

Mitre link : CVE-2026-49406

CVE.ORG link : CVE-2026-49406

JSON object : View

Products Affected

deno

deno

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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