CVE-2025-21620

HIGH EPSS 38.8%
Published Jan 6, 20251y ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
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Published Jan 6, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. When you send a request with the Authorization header to one domain, and the response asks to redirect to a different domain, Deno'sfetch() redirect handling creates a follow-up redirect request that keeps the original Authorization header, leaking its content to that second domain. This vulnerability is fixed in 2.1.2.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
38.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure

References 1

  • github.com https://github.com/denoland/deno/security/advisories/GHSA-f27p-cmv8-xhm6

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.