VulnerabilityModified

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.

HIGH 7.5EPSS 20.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 20.0%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.

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 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 19.99% probability · 97th percentile
CISA KEV: Not listed
Weakness: CWE-502, CWE-400
Affected: facebook/react · vercel/next.js
Source: cve-assign@fb.com

References

https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-componentsVendor Advisory
https://www.facebook.com/security/advisories/cve-2025-67779Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.