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The vulnerability CVE-2025-55184 exploits a flaw in the deserialization process of React Server Components within Next.js App Router endpoints. A specifically crafted malicious HTTP request, when received by a vulnerable server, triggers an inefficient or non-terminating parsing algorithm. This occurs when the server attempts to deserialize a maliciously structured data element, causing the Node.js event loop to block. The process enters a state of high CPU consumption without releasing resources, leading to an immediate and sustained hang. This exhausts the available worker threads, preventing the server from handling any subsequent legitimate requests, resulting in a complete denial of service from a single request.
DailyCVE Form:
Platform: Next.js (Vercel)
Version: 13.3.0-16.1.0
Vulnerability: Denial of Service
Severity: High
Date: 2025-12-11
Prediction: 2025-12-18
What Undercode Say:
Analytics:
npm list next react react-dom
grep -E '"next"|"react"|"react-dom"' package.json
// Malicious request payload structure
{"type":"malicious-element","props":{}}
How Exploit:
curl -X POST https://target.com/api/route \
-H "Content-Type: application/json" \
-d '{"exploit_payload": "CVE-2025-55184"}'
Crafted HTTP request.
Server component deserialization attack.
CPU exhaustion loop.
Protection from this CVE
Update to patched versions.
Implement request rate limiting.
Use a WAF.
Impact:
Service unavailability (DoS).
Resource exhaustion (CPU).
No data compromise.
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Sources:
Reported By: github.com
Extra Source Hub:
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