VYPR
Moderate severityNVD Advisory· Published Jun 4, 2025· Updated Jun 4, 2025

Deno.env.toObject() ignores the variables listed in --deny-env and returns all environment variables

CVE-2025-48934

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
denocrates.io
< 2.1.132.1.13
denocrates.io
>= 2.2.0, < 2.2.132.2.13
deno_runtimecrates.io
< 0.212.00.212.0

Affected products

3

Patches

Vulnerability mechanics

References

8

News mentions

0

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