CVE-2025-48934

MEDIUM EPSS 27.8%
Published Jun 4, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 4.0
Medium
Find Similar
Published Jun 4, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
27.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-201

Affected Products 2

VendorProductVersionRange
denodeno* <2.1.13
denodeno*≥2.2.0  –  <2.2.13

References 6

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

Remediation

  • github.com https://github.com/denoland/deno/commit/2959e083912420988066a001c2b2d6732a1b562f
    Patch
  • github.com https://github.com/denoland/deno/commit/946ccda1aa19a00c478a5e6826b75053b050d753
    Patch
  • github.com https://github.com/denoland/deno/pull/29079
    Issue TrackingPatch