{"id":"CVE-2026-46342","aliases":["GHSA-g8wj-3cr3-6w7v"],"url":"https://o3.security/vulnerability/CVE-2026-46342","summary":"Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning","details":"Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, the /__nuxt_island/* endpoint accepts attacker-controlled props query/body parameters and renders any island component without verifying that the URL-resident hash (<Name>_<hashId>.json) was actually issued for those inputs by <NuxtIsland>. The hash is computed and embedded client-side but never validated server-side, so the same path can return materially different responses depending on the query. This issue has been patched in versions 3.21.6 and 4.4.6.","published":"2026-06-12T12:50:41.589Z","modified":"2026-08-12T03:51:33.083499203Z","cvss":null,"epss":{"score":0.00091,"percentile":0.00569,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"nuxt","fixedVersion":"3.21.6"},{"ecosystem":"npm","name":"nuxt","fixedVersion":"4.4.6"},{"ecosystem":"npm","name":"@nuxt/nitro-server","fixedVersion":"3.21.6"},{"ecosystem":"npm","name":"@nuxt/nitro-server","fixedVersion":"4.4.6"}],"fix":{"url":"https://github.com/nuxt/nuxt/pull/35077","label":"nuxt/nuxt#35077"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46342.json"},{"type":"ADVISORY","url":"https://github.com/nuxt/nuxt/security/advisories/GHSA-g8wj-3cr3-6w7v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46342"},{"type":"FIX","url":"https://github.com/nuxt/nuxt/pull/35077"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:33.083499203Z"}}