CVE-2026-44578
HIGH 8.6EPSS 38.9%
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 WebSocket upgrade requests. An attacker can cause the server to proxy requests to arbitrary internal or external destinations, which may expose internal services or cloud metadata endpoints. Vercel-hosted deployments are not affected. This vulnerability is fixed in 15.5.16 and 16.2.5.
- CVSS v3.1
- 8.6 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS v3.1
- 8.6 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS v3.1
- 8.6 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - EPSS
- 38.87% chance of exploitation in the next 30 days, 98th percentile
- Nuclei
- high · CWE-918
- Published
- 2026-05-13
- Updated
- 2026-08-13
Proof-of-concept exploits (4)
- love07oj/nextjs-cve-2026-445787★ · 2026-05-15
- 0xBlackash/CVE-2026-445781★ · 2026-05-17
- tocong282/CVE-2026-44578-PoC0★ · 2026-05-15
- lxxexxbxx/CVE-2026-445781★ · 2026-08-20