Unexpected server crash in Next.js version 12.2.3
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-248.
Summary
Next.js is a React framework that can provide building blocks to create web applications. All of the following must be true to be affected by this CVE: Next.js version 12.2.3, Node.js version above v15.0.0 being used with strict `unhandledRejection` exiting AND using next start or a [custom server](https://nextjs.org/docs/advanced-features/custom-server). Deployments on Vercel ([vercel.com](https://vercel.com/)) are not affected along with similar environments where `next-server` isn't being shared across requests.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vercel | next.js | = 12.2.3 | — | No fix listed | CNA |
| — | next (npm) | 12.2.3 to before 12.2.4 | 12.2.4 | Patch available | GHSA-wff4-fpwg-qqv3 |
- next.js Vendorvercel Affected = 12.2.3 Fixed in — No fix listed CNA
- next (npm) Vendor— Affected 12.2.3 to before 12.2.4 Fixed in 12.2.4 Patch available GHSA-wff4-fpwg-qqv3
Remediation
- Fix · GHSA-wff4-fpwg-qqv3 next (npm) Fixed in 12.2.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2022-36046
- 2026-10-03 Alias added: GHSA-wff4-fpwg-qqv3
References
More vercel Next.js vulnerabilities
- TI-2025-34861 Deserialization of untrusted data in Meta react-server-dom-webpack KEVCVSS 3.1CRITICAL 10.0
- TI-2025-21309 Authorization Bypass in Next.js Middleware CVSS 3.1CRITICAL 9.1
- TI-2025-34863 Deserialization of untrusted data in Meta react-server-dom-webpack CVSS 3.1HIGH 7.5
- TI-2024-31371 Cache Poisoning in next.js CVSS 3.1HIGH 7.5
- TI-2023-24914 Next.js before 13.4.20-canary.13 lacks a cache-control header and thus empty prefetch… CVSS 3.1HIGH 7.5
- TI-2026-32490 Next.js: Server-side request forgery in applications using WebSocket upgrades CVSS 3.1HIGH 8.6
Sources
- CVE-2022-36046 · CVE Program
- CVE-2022-36046 · NVD
- FIRST EPSS
- GHSA-wff4-fpwg-qqv3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences