What is CVE-2026-44576?

CVE-2026-44576 is a medium-severity vulnerability in Vercel Next.js, classified under CWE-436. CVSS score: 5.4/10. Published 2026-05-13.

How severe is CVE-2026-44576?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Vercel Next.js

CVE-2026-44576

Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition…

EPSS: 0.000 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L.

Affected products

Vercel Next.js — versions >= 14.2.0, < 15.5.16, >= 16.0.0, < 16.2.5

Weakness classification (CWE)

CWE-436

References

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

Frequently asked questions

What is CVE-2026-44576?: CVE-2026-44576 is a medium-severity vulnerability in Vercel Next.js, classified under CWE-436. CVSS score: 5.4/10. Published 2026-05-13.
How severe is CVE-2026-44576?: Medium severity. CVSS v3 base score is 5.4 out of 10.