{"cve":{"cve_id":"CVE-2025-55182","is_kev":true,"kev_date_added":"2025-12-05","kev_vendor_project":"Meta","kev_product":"React Server Components","kev_vulnerability_name":"Meta React Server Components Remote Code Execution Vulnerability","kev_short_description":"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.","kev_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.","kev_due_date":"2025-12-12","kev_known_ransomware":true,"kev_notes":"Check for signs of potential compromise on all internet accessible REACT instances after applying mitigations. For more information, please see: https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components ; https://github.com/vercel-labs/fix-react2shell-next?tab=readme-ov-file ; https://nvd.nist.gov/vuln/detail/CVE-2025-55182","kev_cwes":[],"epss_score":0.99802,"epss_percentile":0.99957,"epss_as_of":"2026-10-15","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.","published_at":"2025-12-03T15:40:56.894000Z","last_modified_at":"2026-10-18T17:10:00.110000Z","cvss_v3_score":10.0,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-502"],"nvd_references":["https://www.facebook.com/security/advisories/cve-2025-55182","https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components"],"vuln_status":"Analyzed","trending_score":0.59969567841066,"is_trending":true,"has_trended":true,"trended_number_one":true,"trending_peak_score":0.6597176119260666,"trending_peak_rank":1,"started_trending_at":"2026-06-29T02:30:27.366045Z","trended_number_one_at":"2026-10-18T05:03:51.295104Z","summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-10-26T20:45:18.267784Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","exploit","trending","was_number_one","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack 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