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Deno CVE-2025-48934

| EUVD-2025-16913 MEDIUM
Insertion of Sensitive Information Into Sent Data (CWE-201)
2025-06-04 security-advisories@github.com GHSA-7w8p-chxq-2789
5.3
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SUSE
MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

5
EUVD ID Assigned
Mar 14, 2026 - 17:29 euvd
EUVD-2025-16913
Analysis Generated
Mar 14, 2026 - 17:29 vuln.today
Patch released
Mar 14, 2026 - 17:29 nvd
Patch available
PoC Detected
Jul 02, 2025 - 13:43 vuln.today
Public exploit code
CVE Published
Jun 04, 2025 - 20:15 nvd
MEDIUM 5.3

DescriptionGitHub Advisory

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.

AnalysisAI

A security vulnerability in Deno (CVSS 5.3). Risk factors: public PoC available. Vendor patch is available.

Technical ContextAI

CWE-201 (Information Exposure via Sent Data). Affects Deno.

RemediationAI

Apply the vendor-supplied patch immediately.

Vendor StatusVendor

SUSE

Severity: Medium

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CVE-2025-48934 vulnerability details – vuln.today

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