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 v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:deno:deno::::::::
	cpe:2.3:a:deno:deno::::::::

History

02 Jul 2025, 13:43

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-04 20:15

Updated : 2025-07-02 13:43

NVD link : CVE-2025-48934

Mitre link : CVE-2025-48934

CVE.ORG link : CVE-2025-48934

JSON object : View

Products Affected

deno

deno

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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