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Vulnerabilities

Vulnerability · CVE-2025-55182

Meta React Server Components Remote Code Execution Vulnerability

Published Dec 3, 2025 · catalog updated Oct 8, 2026 · Meta React Server Components

Patch now

CVE-2025-55182 is in the CISA known-exploited catalog, due Dec 12, 2025. Confirm Meta React Server Components against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical10.0
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.80%
Remediation
Remediation guidance
Affected products
cpe facebook/react · cpe vercel/next.js · vendor 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. VulnCheck canary evidence. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe facebook/react19.0.0
  • cpe facebook/react19.1.0
  • cpe facebook/react19.1.1
  • cpe facebook/react19.2.0
  • cpe vercel/next.jsversion unspecified
  • vendor Meta React Server Componentsversion unspecified

How to fix CVE-2025-55182

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-55182 is in the CISA known-exploited catalog, due Dec 12, 2025. Confirm Meta React Server Components against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 19.0.0, 19.1.0, 19.1.1, 19.2.0. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 99.80%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 3, 2025 · Catalog

    Detected

    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.

  2. Dec 5, 2025 · CISA KEV

    Known exploited

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

  3. Dec 12, 2025 · CISA KEV

    Remediation due

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

  4. Oct 8, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2025-55182

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55182

    30-day exploitation probability 99.8%

    first.org
  • Exploit DatabasePublic exploit reference52506

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/react2shell_unauth_rce_cve_2025_55182

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2025-55182

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-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 a

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.