{"id":"CVE-2026-71321","title":"Nuxt is an open-source web development framework for Vue.js","summary":"Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint `/__nuxt_island/...` decodes and hashes attacker-controlled JSON body input with destr and ohash befor…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-407","CWE-770"],"vendor":"nuxt","product":"nuxt","affected":["nuxt >= 4.0.0, < 4.5.1","nuxt >= 3.1.0, < 3.21.10"],"patched":["nuxt 4.5.1","nuxt 3.21.10"],"published":"2026-08-05","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:51:43.490","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71321","references":[{"url":"https://github.com/nuxt/nuxt/commit/4e35ae9babd94be53246e31200232d48438bb34e","label":"security-advisories@github.com"},{"url":"https://github.com/nuxt/nuxt/commit/668cdfdfda41849ed11c1ee5e2067a11fc103b22","label":"security-advisories@github.com"},{"url":"https://github.com/nuxt/nuxt/releases/tag/v3.21.10","label":"security-advisories@github.com"},{"url":"https://github.com/nuxt/nuxt/releases/tag/v4.5.1","label":"security-advisories@github.com"},{"url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-9pgf-384g-p7mv","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-9pgf-384g-p7mv"}],"tags":["nvd","ghsa","npm"],"epss":0.00742,"epssPercentile":0.52727,"aliases":["GHSA-9pgf-384g-p7mv"],"ecosystem":"npm","ingestedAt":"2026-08-05T21:52:35.698Z","slug":"CVE-2026-71321","body":"## Overview\n\nNuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint `/__nuxt_island/...` decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated `POST /__nuxt_island/_.json` with a large JSON body is fully read, parsed, hashed, and then rejected, which wastes CPU on Nitro single event loop and delays concurrent requests. No valid hash and no authentication are required. This issue is fixed in 3.21.10 and 4.5.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-71321)\n\nAffected packages:\n\n- `nuxt >= 4.0.0, < 4.5.1`\n- `nuxt >= 3.1.0, < 3.21.10`\n\nPatched in:\n\n- `nuxt 4.5.1`\n- `nuxt 3.21.10`\n\nSource: https://github.com/advisories/GHSA-9pgf-384g-p7mv","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}