Vulnerability in Node.js Node
CVE-2026-48931
A flaw in Node.js HTTP Agent can cause a client to accept as valid a response that is send before the client has sent the request. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Node.js Node — versions 22.22.3, 24.16.0, 26.3.0
- Node.js — versions 22.22.3, 24.16.0, 26.3.0
Weakness classification (CWE)
References
- nodejs.org/en/blog/vulnerability/june-2026-security-releases (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-48931?
- CVE-2026-48931 is a low-severity vulnerability in Node.js Node, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 3.7/10. Published 2026-06-22.
- How severe is CVE-2026-48931?
- Low severity. CVSS v3 base score is 3.7 out of 10.