Vulnerability Description
Next.js is a React framework for building full-stack web applications. From to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vercel | Next.Js | >= 15.0.0, < 15.5.16 |
Related Weaknesses (CWE)
References
- https://github.com/vercel/next.js/security/advisories/GHSA-mg66-mrh9-m8jxMitigationVendor Advisory
FAQ
What is CVE-2026-44579?
CVE-2026-44579 is a vulnerability with a CVSS score of 7.5 (HIGH). Next.js is a React framework for building full-stack web applications. From to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerabl...
How severe is CVE-2026-44579?
CVE-2026-44579 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44579?
Check the references section above for vendor advisories and patch information. Affected products include: Vercel Next.Js.