{"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":0.99562,"epss_percentile":0.99941,"epss_as_of":"2026-06-23","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":null,"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":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"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":null,"trending_score":0.6100402422496602,"is_trending":true,"has_trended":true,"trended_number_one":false,"trending_peak_score":0.6100402422496602,"trending_peak_rank":17,"started_trending_at":"2026-06-29T02:30:27.366045Z","trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T02:30:27.550645Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","poc","trending","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-parcel","product_name":"react-server-dom-parcel","version_start":"19.2.0","version_start_inclusive":true,"version_end":"19.2.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-parcel:19.2.0:19.2.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-parcel","product_name":"react-server-dom-parcel","version_start":"19.0.0","version_start_inclusive":true,"version_end":"19.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-parcel:19.0.0:19.0.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-parcel","product_name":"react-server-dom-parcel","version_start":"19.1.0","version_start_inclusive":true,"version_end":"19.1.1","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-parcel:19.1.0:19.1.1"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-turbopack","product_name":"react-server-dom-turbopack","version_start":"19.1.0","version_start_inclusive":true,"version_end":"19.1.1","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-turbopack:19.1.0:19.1.1"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-turbopack","product_name":"react-server-dom-turbopack","version_start":"19.0.0","version_start_inclusive":true,"version_end":"19.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-turbopack:19.0.0:19.0.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-turbopack","product_name":"react-server-dom-turbopack","version_start":"19.2.0","version_start_inclusive":true,"version_end":"19.2.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-turbopack:19.2.0:19.2.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-webpack","product_name":"react-server-dom-webpack","version_start":"19.0.0","version_start_inclusive":true,"version_end":"19.0.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-webpack:19.0.0:19.0.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-webpack","product_name":"react-server-dom-webpack","version_start":"19.2.0","version_start_inclusive":true,"version_end":"19.2.0","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-webpack:19.2.0:19.2.0"},{"vendor_slug":"meta","vendor_name":"Meta","product_slug":"react-server-dom-webpack","product_name":"react-server-dom-webpack","version_start":"19.1.0","version_start_inclusive":true,"version_end":"19.1.1","version_end_inclusive":true,"cpe23_uri":"cve5:meta:react-server-dom-webpack:19.1.0:19.1.1"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-55182.yaml","title":"React Server Components - Remote Code Execution","author":"DhiyaneshDk,princechaddha,assetnote,lachlan2k,maple3142,iamnooob","disclosed_at":null}],"news":[],"references":[{"url":"https://www.facebook.com/security/advisories/cve-2025-55182","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-12-03T15:40:56.894000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2025-12-05T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"cvss_changed","at":"2026-06-28T17:47:54.064885Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:47:54.064885Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:47:54.064885Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"started_trending","at":"2026-06-29T02:30:27.366045Z","label":"Started trending","source":null}]}