CVE-2025-55182

CISA KEV RANSOMWARE

ACT NOW Priority: 0.00 BB Relevance: 10/100

Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

Description

Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182.

CISA Known Exploited Vulnerability

Vendor / Product Meta — React Server Components

Date Added 2025-12-05

Remediation Due 2025-12-12

Ransomware Use CONFIRMED

Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182

Weakness Classification (1)

CWE-502

Affected Software (82)

Vendor	Product	Version
facebook	react	19.0.0
facebook	react	19.1.0
facebook	react	19.1.1
facebook	react	19.2.0
vercel	next.js	15.0.0 – 15.0.5
vercel	next.js	15.1.0 – 15.1.9
vercel	next.js	15.2.0 – 15.2.6
vercel	next.js	15.3.0 – 15.3.6
vercel	next.js	15.4.0 – 15.4.8
vercel	next.js	15.5.0 – 15.5.7
vercel	next.js	16.0.0 – 16.0.7
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	14.3.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0
vercel	next.js	15.6.0