Remote denial of service in Undici

1) Memory leak

EUVDB-ID: #VU109244

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-47279

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due memory leak when handling invalid certificates. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

undici: 5.0.0 - 7.4.0

CPE2.3

• cpe:2.3:a:nodejs:undici:5.0.0:*:*:*:*:nodejs:*:*
• cpe:2.3:a:nodejs:undici:5.1.0:*:*:*:*:nodejs:*:*
• cpe:2.3:a:nodejs:undici:5.1.1:*:*:*:*:nodejs:*:*

External links

https://github.com/nodejs/undici/issues/3895
https://github.com/nodejs/undici/pull/4088
https://github.com/nodejs/undici/security/advisories/GHSA-cxrh-j4jr-qwg3

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.