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.
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Tue, 23 Jun 2026 18:30:00 +0000
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Tue, 23 Jun 2026 17:30:00 +0000
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| Description | 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. | |
| Title | Deno: BYONM module resolution allows `package.json` main path traversal to bypass `--allow-read` restrictions | |
| Weaknesses | CWE-22 | |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-23T17:50:19.392Z
Reserved: 2026-05-29T19:08:01.257Z
Link: CVE-2026-49406
Updated: 2026-06-23T17:50:09.415Z
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OpenCVE Enrichment
Updated: 2026-06-23T21:30:07Z