CVEs / CVE-2025-55182
CVE-2025-55182: Meta React Server Components Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 5 Dec 2025
- critical 10 CVSS 3.1 (from the CNA)
- EPSS 99.8% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Meta react-server-dom-webpack | from 19.0.0, up to and including 19.0.0 | — |
| Meta react-server-dom-webpack | from 19.1.0, up to and including 19.1.1 | — |
| Meta react-server-dom-webpack | from 19.2.0, up to and including 19.2.0 | — |
| Meta react-server-dom-turbopack | from 19.0.0, up to and including 19.0.0 | — |
| Meta react-server-dom-turbopack | from 19.1.0, up to and including 19.1.1 | — |
| Meta react-server-dom-turbopack | from 19.2.0, up to and including 19.2.0 | — |
| Meta react-server-dom-parcel | from 19.0.0, up to and including 19.0.0 | — |
| Meta react-server-dom-parcel | from 19.1.0, up to and including 19.1.1 | — |
| Meta react-server-dom-parcel | from 19.2.0, up to and including 19.2.0 | — |
| Product | Affected | Fixed in |
|---|---|---|
| react-server-dom-webpack (npm) | from 19.0.0, before 19.0.1 | 19.0.1 |
| react-server-dom-webpack (npm) | from 19.1.0, before 19.1.2 | 19.1.2 |
| react-server-dom-webpack (npm) | from 19.2.0, before 19.2.1 | 19.2.1 |
| react-server-dom-turbopack (npm) | from 19.0.0, before 19.0.1 | 19.0.1 |
| react-server-dom-turbopack (npm) | from 19.1.0, before 19.1.2 | 19.1.2 |
| react-server-dom-turbopack (npm) | from 19.2.0, before 19.2.1 | 19.2.1 |
| react-server-dom-parcel (npm) | from 19.0.0, before 19.0.1 | 19.0.1 |
| react-server-dom-parcel (npm) | from 19.1.0, before 19.1.2 | 19.1.2 |
| react-server-dom-parcel (npm) | from 19.2.0, before 19.2.1 | 19.2.1 |
Package versions from GHSA-fv66-9v8q-g76r.
Exploitation
| In CISA KEV since | 5 Dec 2025 |
|---|---|
| Due date for US federal agencies | 12 Dec 2025 |
| Used in ransomware campaigns | Known |
| 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. |
Severity
| CVSS 3.1 | 10 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2025-55182 on NVD
- CVE-2025-55182 in the CISA KEV catalog
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components (cited by CISA)
- https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file (cited by CISA)
- CVE-2025-55182 on OSV
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components Patch, Vendor Advisory
- https://www.facebook.com/security/advisories/cve-2025-55182 Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/12/03/4 Mailing List, Patch, Third Party Advisory
- https://news.ycombinator.com/item?id=46136026 Issue 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-2025-55182 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.