Vulnerability in Node.js Undici

CVE-2025-47279

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (23.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-47279: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

  • Node.js Undici — versions < 5.29.0, >= 6.0.0, < 6.21.2, >= 7.0.0, < 7.5.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-47279?
CVE-2025-47279 is a low-severity vulnerability in Node.js Undici, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.1/10. Published 2025-05-15.
How severe is CVE-2025-47279?
Low severity. CVSS v3 base score is 3.1 out of 10.