{"id":"CVE-2025-55183","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-55183","generatedAt":"2026-10-28T09:26:25.911Z","title":"An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and…","description":"An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.","published":"2025-12-11T20:16:00.000Z","lastModified":"2026-10-07T20:10:02.000Z","status":"Analyzed","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":[],"affected":["vercel/next.js","facebook/react"],"epss":{"score":0.64233,"percentile":0.99226,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 64.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://react.dev/blog/2025/12/11/denial-of-service-and-source-code-exposure-in-react-server-components","tags":["Exploit","Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2025-55183","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-55183","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}