CVE-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…
- Published
- Updated
- Reserved
- Assigned by
- Meta
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Meta React Server Components Remote Code Execution Vulnerability.
- Added
- 5 Dec 2025
- Fix due (US federal)
- 12 Dec 2025
- Used by ransomware
- Known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| MetaCNA (assigner) | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 99.7% · top 0.1% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.
Weakness
- Deserialization of Untrusted Data (CWE-502)
- CWE-502 Deserialization of Untrusted Data (opens in a new tab)All about CWE-502 and its CVEs
Affected products
Meta · react-server-dom-webpack
- affected 19.0.0 – ≤ 19.0.0
- affected 19.1.0 – ≤ 19.1.1
- affected 19.2.0 – ≤ 19.2.0
Meta · react-server-dom-turbopack
- affected 19.0.0 – ≤ 19.0.0
- affected 19.1.0 – ≤ 19.1.1
- affected 19.2.0 – ≤ 19.2.0
Meta · react-server-dom-parcel
- affected 19.0.0 – ≤ 19.0.0
- affected 19.1.0 – ≤ 19.1.1
- affected 19.2.0 – ≤ 19.2.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmreact-server-dom-parcelGHSA-fv66-9v8q-g76r (opens in a new tab)
- npmreact-server-dom-turbopackGHSA-fv66-9v8q-g76r (opens in a new tab)
- npmreact-server-dom-webpackGHSA-fv66-9v8q-g76r (opens in a new tab)
References (6)
- https://www.facebook.com/security/advisories/cve-2025-55182 (opens in a new tab)x_refsource_CONFIRM
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components (opens in a new tab)x_refsource_CONFIRM
- https://aws.amazon.com/blogs/security/china-nexus-cyber-threat-groups-rapidly-exploit-react2shell-vulnerability-cve-2025-55182/ (opens in a new tab)media-coverage
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55182 (opens in a new tab)government-resource
- http://www.openwall.com/lists/oss-security/2025/12/03/4 (opens in a new tab)
- https://news.ycombinator.com/item?id=46136026 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-fv66-9v8q-g76r (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-55182)Record last updated .