Answer in brief
CVE-2026-44579 records a High severity (CVSS 7.5) vulnerability in Next.js: Denial of Service via connection exhaustion in applications using Cache Components. The current sources do not mark it as known exploited. The current feed maps vercel/next.js (generic), next (npm), next (npm), next (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps vercel/next.js (generic), next (npm), next (npm), next (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| vercel/next.jsgeneric | >=16.0.0 <16.2.5 || >=15.0.0 <15.5.16 | 16.2.5, 15.5.16 |
| nextnpm | >=16.0.0,<16.2.5 | 16.2.5 |
| nextnpm | >=15.0.0<15.5.16 | Not reported |
| nextnpm | >=16.0.0<16.2.5 | Not reported |
| nextnpm | >=15.0.0,<15.5.16 | 15.5.16 |
Published upstream
May 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.