{"cve":"CVE-2025-49005","nvd":{"published":"2025-07-03T21:15:26.787","modified":"2026-06-17T09:30:39.437","status":"Analyzed","description":"Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7},"cwes":["CWE-444"],"references":["https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066","https://github.com/vercel/next.js/issues/79346","https://github.com/vercel/next.js/releases/tag/v15.3.3","https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4","https://vercel.com/changelog/cve-2025-49005"],"products":["vercel:next.js","vercel:vercel"],"source":"nvd","synced_at":"2026-10-19T22:04:28.436527499+00:00"},"epss":{"cve":"CVE-2025-49005","score":0.00491,"percentile":0.42202,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r2fc-ccr8-96c4","url":"https://osv.dev/vulnerability/GHSA-r2fc-ccr8-96c4","summary":"Next.js has a Cache poisoning vulnerability due to omission of the Vary header","modified":"2026-09-10T03:50:26.244210069Z","packages":[{"ecosystem":"npm","name":"next","purl":"pkg:npm/next","ranges":[">=15.3.0 <15.3.3"],"fixed":["15.3.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}