CVE-2026-44579
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 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-770, CWE-833
- Published
- Modified
- Record from
- the NVD, synced
Affected
- vercel:next.js
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mg66-mrh9-m8jx | npm | next | >=15.0.0 <15.5.16 | 15.5.16 |
| GHSA-mg66-mrh9-m8jx | npm | next | >=16.0.0 <16.2.5 | 16.2.5 |