Meta React Server Components Remote Code Execution Vulnerability

Meta React Server Components

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. Added to CISA KEV on 2025-12-05 (federal deadline 2025-12-12).

First seen: 5 Dec 2025
Last update: 5 Dec 2025, 12:00 UTC
Identifiers: CVE-2025-55182
Source: CISA KEV
On the menu as: Next.js
React

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Meta React Server Components Remote Code Execution Vulnerability
Severity: critical, exploited in the wild. Patch status: patched.
Affected: Meta React Server Components
Ids: CVE-2025-55182

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. Added to CISA KEV on 2025-12-05 (federal deadline 2025-12-12).

## Steps
1. Search the repo, its CI and infra config for Meta React Server Components. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2025-55182") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file https://nvd.nist.gov/vuln/detail/CVE-2025-55182
https://pwned.coffee/i/meta-react-server-components-remote-code-execution-vulne-cve-2025-55182

Sources

Totalone very hot coffee