{"answers":{"affected":"4 open source packages ship an affected version, including nuxt.","exploited":"There is no known exploitation of CVE-2026-71321 in the wild and no public exploit code.","fix":"Upgrade nuxt to a fixed version for your release line: 3.21.10 or 4.5.1.","what":"CVE-2026-71321 is a high-severity denial of service vulnerability in nuxt, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-71321 and fix it if it is affected.\n\nWhat it is: CVE-2026-71321 is a high-severity denial of service vulnerability in nuxt, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-71321 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nuxt (npm): affected from 3.1.0; fixed in 3.21.10\n- nuxt (npm): affected from 3.1.0; fixed in 3.21.10\n- nuxt (npm): affected from 4.0.0; fixed in 4.5.1\n- nuxt (npm): affected from 4.0.0; fixed in 4.5.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-71321/ (Markdown: https://insights.sbomify.com/CVE-2026-71321/index.md)","id":"CVE-2026-71321","markdown":"https://insights.sbomify.com/CVE-2026-71321/index.md","name":"CVE-2026-71321","record":{"aliases":["GHSA-9pgf-384g-p7mv"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Nuxt web framework","requires_auth":"none","summary":"Unauthenticated attackers can cause CPU exhaustion and service delays by sending large JSON payloads to the Nuxt island endpoint before hash validation occurs.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"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 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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Nuxt: Unauthenticated CPU exhaustion parsing and hashing the Nuxt island endpoint body before hash validation","id":"CVE-2026-71321","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":5,"next":{"headline":"Lemur: Missing authorization check on POST /certificates/\u003cid\u003e/export for plugins with requires_key = False","id":"CVE-2026-71322"},"packages":[{"ecosystem":"npm","fixed":["3.21.10"],"introduced":["3.1.0"],"last_affected":[],"package":"nuxt","purl":null,"source":"GHSA-9pgf-384g-p7mv"},{"ecosystem":"npm","fixed":["3.21.10"],"introduced":["3.1.0"],"last_affected":[],"package":"nuxt","purl":"pkg:npm/nuxt","source":"GHSA-9pgf-384g-p7mv"},{"ecosystem":"npm","fixed":["4.5.1"],"introduced":["4.0.0"],"last_affected":[],"package":"nuxt","purl":null,"source":"GHSA-9pgf-384g-p7mv"},{"ecosystem":"npm","fixed":["4.5.1"],"introduced":["4.0.0"],"last_affected":[],"package":"nuxt","purl":"pkg:npm/nuxt","source":"GHSA-9pgf-384g-p7mv"}],"prev":{"headline":"Nuxt: Server-Side Remote Code Execution via Runtime Template Injection in Nuxt Server Island Props","id":"CVE-2026-71320"},"products":["nuxt"],"published":"2026-08-05","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-06","vendors":["nuxt"]},"summary":"Unauthenticated attackers can cause CPU exhaustion and service delays by sending large JSON payloads to the Nuxt island endpoint before hash validation occurs.","url":"https://insights.sbomify.com/CVE-2026-71321/"}