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CVE-2025-48934

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

Published: Jun 4, 2025Updated: Jul 2, 2025 Sources: CVE List NVD GHSACWE-201
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 72.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-201

Affected Products

denodenoland
On-prem
OSS Libraries / generic-library
denodeno
Library
OSS Libraries / generic-library
denocrates.ioOSS Libraries
deno_runtimecrates.ioOSS Libraries
denolandoss-projectUSOSS Librariesaka deno
denooss-projectOSS Librariesaka deno runtime, deno standard modules
crates.iopackage-ecosystemOSS Libraries

Exploitability

Official Patch Available

References

https://github.com/denoland/deno/security/advisories/GHSA-7w8p-chxq-2789
github.com
https://github.com/denoland/deno/pull/29079
github.com
https://github.com/denoland/deno/commit/2959e083912420988066a001c2b2d6732a1b562f
github.com
and 5 more references View all →

Timeline

Published
Jun 4, 2025
Last Updated
Jul 2, 2025

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