Answer in brief
CVE-2026-64646 records a Medium severity vulnerability in Next.js: Unbounded Server Action payload in Edge runtime. The current sources do not mark it as known exploited. The current feed maps next (npm), 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.
A CVSS score is not reported in the current record. 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 next (npm), next (npm), next (npm), next (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| nextnpm | >=13.0.0 <15.5.21 | 15.5.21 |
| nextnpm | >=16.0.0 <16.2.11 | 16.2.11 |
| nextnpm | >=13.0.0<15.5.21 | Not reported |
| nextnpm | >=16.0.0<16.2.11 | Not reported |
| nextnpm | >=13.0.0,<15.5.21 | 15.5.21 |
| nextnpm | >=16.0.0,<16.2.11 | 16.2.11 |
Published upstream
Jul 21, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Jul 23, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Aug 8, 2026
## Impact Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime ## Workarounds If you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be allowed at max by your hosting provider.
Quoted source text, attributed separately from HOL analysis.