Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00035.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Nodejs
  • Undici

No data.

No data.

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Vendors Products
Nodejs
  • Undici
Advisories
Source ID Title
EUVD EUVD EUVD-2025-15389 Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.
Github GHSA Github GHSA GHSA-cxrh-j4jr-qwg3 undici Denial of Service attack via bad certificate data
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/nodejs/undici/issues/3895 cve-icon cve-icon cve-icon
https://github.com/nodejs/undici/pull/4088 cve-icon cve-icon cve-icon
https://github.com/nodejs/undici/security/advisories/GHSA-cxrh-j4jr-qwg3 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-47279 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-47279 cve-icon
History

Fri, 16 May 2025 15:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Low

Fri, 16 May 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 15 May 2025 17:30:00 +0000

Type Values Removed Values Added
Description Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.
Title undici Denial of Service attack via bad certificate data
Weaknesses CWE-401
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-05-16T13:44:28.438Z

Reserved: 2025-05-05T16:53:10.373Z

Link: CVE-2025-47279

cve-icon Vulnrichment

Updated: 2025-05-15T17:56:23.757Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-05-15T18:15:38.027

Modified: 2025-05-16T14:43:26.160

Link: CVE-2025-47279

cve-icon Redhat

Severity : Low

Publid Date: 2025-05-15T17:16:02Z

Links: CVE-2025-47279 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-06-23T19:31:58Z