Vulnerability in Nodejs Node
CVE-2026-21710
A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Obj…
EPSS: 0.000 (11.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Nodejs Node — versions 20.20.1, 22.22.1, 24.14.0
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2026-21710?
- CVE-2026-21710 is a high-severity vulnerability in Nodejs Node. CVSS score: 7.5/10. Published 2026-03-30.
- How severe is CVE-2026-21710?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2026-21710 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.