Cloudanix VulnDB

CVE-2026-49406

Medium · 5.5

CVSS

5.5

EPSS

0.2%

Published

Jun 23, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed
crates.io deno 0 2.7.12

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