What is CVE-2026-44577?

CVE-2026-44577 is a medium-severity vulnerability in Vercel Next.js, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-05-13.

How severe is CVE-2026-44577?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Resource exhaustion in Vercel Next.js

CVE-2026-44577

Next.js is a React framework for building full-stack web applications. From 10.0.0 to before 15.5.16 and 16.2.5, when self-hosting Next.js with the default image loader, the Image Optimization API fetches local images entirely into memory…

EPSS: 0.000 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Vercel Next.js — versions >= 10.0.0, < 15.5.16, >= 16.0.0, < 16.2.5

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

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

Frequently asked questions

What is CVE-2026-44577?: CVE-2026-44577 is a medium-severity vulnerability in Vercel Next.js, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2026-05-13.
How severe is CVE-2026-44577?: Medium severity. CVSS v3 base score is 5.9 out of 10.