CVE-2025-48934

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to versions 2.1.13 and 2.2.13, the `Deno.env.toObject` method ignores any variables listed in the `--deny-env` option of the `deno run` command. When looking at the documentation of the `--deny-env` option this might lead to a false impression that variables listed in the option are impossible to read. Software relying on the combination of both flags to allow access to most environment variables except a few sensitive ones will be vulnerable to malicious code trying to steal secrets using the `Deno.env.toObject()` method. Versions 2.1.13 and 2.2.13 contains a patch.

CVSS

No CVSS.

References

Link	Resource
https://docs.deno.com/api/deno/~/Deno.Env.toObject
https://docs.deno.com/runtime/fundamentals/security/#environment-variables
https://github.com/denoland/deno/commit/2959e083912420988066a001c2b2d6732a1b562f
https://github.com/denoland/deno/commit/946ccda1aa19a00c478a5e6826b75053b050d753
https://github.com/denoland/deno/pull/29079
https://github.com/denoland/deno/security/advisories/GHSA-7w8p-chxq-2789
https://github.com/denoland/deno/security/advisories/GHSA-7w8p-chxq-2789

Configurations

No configuration.

History

05 Jun 2025, 20:12

Type	Values Removed	Values Added
Summary		(es) Deno es un entorno de ejecución de JavaScript, TypeScript y WebAssembly. En versiones anteriores a la 2.1.13 y la 2.2.13, el método `Deno.env.toObject` ignora las variables listadas en la opción `--deny-env` del comando `deno run`. Al consultar la documentación de la opción `--deny-env`, esto podría dar la falsa impresión de que las variables listadas en ella son imposibles de leer. El software que utiliza la combinación de ambos indicadores para acceder a la mayoría de las variables de entorno, excepto algunas sensibles, será vulnerable a código malicioso que intente robar secretos mediante el método `Deno.env.toObject()`. Las versiones 2.1.13 y 2.2.13 contienen un parche.

04 Jun 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-04 20:15

Updated : 2025-06-05 20:12

NVD link : CVE-2025-48934

Mitre link : CVE-2025-48934

CVE.ORG link : CVE-2025-48934

JSON object : View

Products Affected

No product.

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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