CVE-2025-67779

HIGH
Published Dec 12, 2025 Modified Dec 12, 2025 CWE-502 CWE-400

Description

It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-502 Deserialization of Untrusted Data
CWE-400 Uncontrolled Resource Consumption

Affected Products

Vendor Product
facebook react
facebook react
facebook react
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js
vercel next.js

References

Frequently Asked Questions

What is CVE-2025-67779? +
It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-67779? +
CVE-2025-67779 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-67779? +
CVE-2025-67779 affects products from facebook, vercel, specifically: next.js, react. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-67779? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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