CVE-2026-94482 · GHSA-p3m5-59mp-jv5r
Next.js: Denial of Service in App Router using Server Actions
- Risk score
- 65/100
- CVSS
- 8.2 v4.0
- Exploit chance (30 days)
- 0.4%
- Published
- 22 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages …
- Affected
- next (npm) >= 13.0.0, <= 15.5.27; next (npm) >= 16.0.0, <= 16.4.0
- Fix
- Upgrade next to 15.5.28 or 16.4.1 (whichever matches your release line) or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.2 high
- Remotely exploitable without logging in
- On your watchlist: npm
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| next | npm | >= 13.0.0, <= 15.5.27 | 15.5.28 |
| next | npm | >= 16.0.0, <= 16.4.0 | 16.4.1 |
References
Original description
Next.js is a React framework for building full-stack web applications. From 13.0.0 until 15.5.28 and 16.4.1, crafted requests targeting App Router applications with at least one Server Action can cause excessive CPU consumption and block processing of further requests in the same process. Applications using the Pages Router and App Router applications without Server Actions are not affected. This issue is fixed in versions 15.5.28 and 16.4.1.
Last activity 22 Oct 2026. Patch Forecast updates every hour.