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CVE-2025-47279— undici Denial of Service attack via bad certificate data

Quick assessment

Affected
nodejs undici
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

undici是Node.js开源的一个HTTP/1.1客户端。 undici 5.29.0、6.21.2和7.5.0之前版本存在安全漏洞，该漏洞源于重复调用无效证书的webhook可能导致内存泄漏。

CVSS 3.1 · Low EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-47279

Vulnerability Information
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Vulnerability Title
undici Denial of Service attack via bad certificate data
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
undici 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
undici是Node.js开源的一个HTTP/1.1客户端。 undici 5.29.0、6.21.2和7.5.0之前版本存在安全漏洞，该漏洞源于重复调用无效证书的webhook可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nodejs undici < 5.29.0 -

II. Public POCs for CVE-2025-47279

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III. Intelligence Information for CVE-2025-47279

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IV. Related Vulnerabilities

Same product: undici
Same vendor: nodejs
Same weakness: CWE-401

V. Comments for CVE-2025-47279

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