What is CVE-2026-2581?

CVE-2026-2581 is a medium-severity vulnerability in Undici, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-03-12.

How severe is CVE-2026-2581?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Resource exhaustion in Undici

CVE-2026-2581

This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS). In vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be acc…

EPSS: 0.000 (5.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Undici — versions < 6.24.0; 7.0.0 < 7.24.0, 6.24.0: 7.24.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/nodejs/undici/security/advisories/GHSA-phc3-fgpg-7m6h
hackerone.com/reports/3513473
cna.openjsf.org/security-advisories.html

Frequently asked questions

What is CVE-2026-2581?: CVE-2026-2581 is a medium-severity vulnerability in Undici, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-03-12.
How severe is CVE-2026-2581?: Medium severity. CVSS v3 base score is 5.9 out of 10.