Home/CVE/Meta React Server Components Remote Code Execution Vulnerability
CVE

CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

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.

CRITICAL · CVSS 10 ⚠ CISA KEV EPSS 0.82011 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules6
⬢

Required Remediation

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

⬡

Weakness Classification

CWE-502Deserialization of Untrusted Data
▤

Affected Products & Versions

9
facebook reactall versions
vercel next.js>= 15.0.0 and < 15.0.5
vercel next.js>= 15.1.0 and < 15.1.9
vercel next.js>= 15.2.0 and < 15.2.6
vercel next.js>= 15.3.0 and < 15.3.6
vercel next.js>= 15.4.0 and < 15.4.8
vercel next.js>= 15.5.0 and < 15.5.7
vercel next.js>= 16.0.0 and < 16.0.7
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm react-server-dom-parcel CRITICAL fixed in 19.1.2
npm react-server-dom-turbopack CRITICAL fixed in 19.1.2
npm react-server-dom-webpack CRITICAL fixed in 19.1.2
⚠

Public Exploits & PoCs

2
webappsReact Server 19.2.0 - Remote Code Execution2026-04-09
nucleiReact Server Components - Remote Code Executioncritical
◈

Detection Rules (IDS/IPS)

3
et-openET WEB_SPECIFIC_APPS Vite RSC React2Shell Unsafe Flight Protocol Property Access (CVE-2025-55182)web-application-attack
et-openET WEB_SPECIFIC_APPS Waku RSC React2Shell Unsafe Flight Protocol Property Access (CVE-2025-55182)web-application-attack
et-openET WEB_SPECIFIC_APPS React Server Components React2Shell Unsafe Flight Protocol Property Access (CVE-2025-55182)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

10
CRITICAL · CVSS v3.1 · cve-assign@fb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Dec 2025 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

10
aws-securityaws-2025-030
cisaKEV-CVE-2025-55182
cisco-csafcisco-sa-react-flight-TYw32Ddb
splunk-security-contentcda04e9c-1950-43ab-87d6-e333a3d7f107
splunk-security-contentbaa80bc8-7c9c-4395-b458-b69feb92830a
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-componentsPatchVendor Advisory
https://www.facebook.com/security/advisories/cve-2025-55182Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/12/03/4Mailing ListPatchThird Party Advisory
https://news.ycombinator.com/item?id=46136026Issue Tracking
https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182US Government Resource
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