What is CVE-2026-44572?

CVE-2026-44572 is a low-severity vulnerability in Vercel Next.js, classified under CWE-349. CVSS score: 3.7/10. Published 2026-05-13.

How severe is CVE-2026-44572?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Vercel Next.js

CVE-2026-44572

Next.js is a React framework for building full-stack web applications. From 12.2.0 to before 15.5.16 and 16.2.5, an external client could send a x-nextjs-data header on a normal request to a path handled by middleware that returns a redire…

EPSS: 0.000 (0.8th percentile) — read the EPSS interpretation.

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:N/A:L.

Affected products

Vercel Next.js — versions >= 12.2.0, < 15.5.16, >= 16.0.0, < 16.2.5

Weakness classification (CWE)

CWE-349

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44572?: CVE-2026-44572 is a low-severity vulnerability in Vercel Next.js, classified under CWE-349. CVSS score: 3.7/10. Published 2026-05-13.
How severe is CVE-2026-44572?: Low severity. CVSS v3 base score is 3.7 out of 10.