What is CVE-2026-44578?

CVE-2026-44578 is a high-severity vulnerability in Vercel Next.js, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-05-13.

How severe is CVE-2026-44578?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2026-44578 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Vercel Next.js

CVE-2026-44578

Next.js is a React framework for building full-stack web applications. From 13.4.13 to before 15.5.16 and 16.2.5, self-hosted applications using the built-in Node.js server can be vulnerable to server-side request forgery through crafted W…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.058 (90.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Vercel Next.js — versions >= 16.0.0, < 16.2.5, >= 13.4.13, < 15.5.16

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2026-44578?: CVE-2026-44578 is a high-severity vulnerability in Vercel Next.js, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-05-13.
How severe is CVE-2026-44578?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2026-44578 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.