Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

CriticalExploitation confirmedCISA KEV Used by ransomware
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run React Server Components, fix it now.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

US federal civilian agencies must remediate by Dec 12, 2025.

Patch status

Official fix available since

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Description

A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorSource
React Server ComponentsMetaKEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog. Version details have not been published yet.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2025-55182 scored CVSS 10.0: Meta React Server Components, Meta React Server Components Remote Code Execution Vulnerability

    CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched React Server Components systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Patch releasedUpdateKEV

    Patch released for CVE-2025-55182: Meta React Server Components, Meta React Server Components Remote Code Execution Vulnerability

    An official fix is now available for Meta React Server Components. This vulnerability is being exploited, so apply it promptly.

    Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • react.dev https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
  • github.com https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2025-55182
  • facebook.com https://www.facebook.com/security/advisories/cve-2025-55182
  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/03/4
  • news.ycombinator.com https://news.ycombinator.com/item?id=46136026
  • aws.amazon.com https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerabilit…
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182