{"answers":{"affected":"2 open source packages ship an affected version, including next. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-64642 in the wild and no public exploit code.","fix":"Upgrade next to 16.2.11 or later.","what":"CVE-2026-64642 is a high-severity authentication bypass vulnerability in Vercel Next.js, published on 27 Jul 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-2026-64642 and fix it if it is affected.\n\nWhat it is: CVE-2026-64642 is a high-severity authentication bypass vulnerability in Vercel Next.js, published on 27 Jul 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-2026-64642 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- next (npm): affected from 16.0.0; fixed in 16.2.11\n- next (npm): affected from 16.0.0; fixed in 16.2.11\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-2026-64642/ (Markdown: https://insights.sbomify.com/CVE-2026-64642/index.md)","id":"CVE-2026-64642","markdown":"https://insights.sbomify.com/CVE-2026-64642/index.md","name":"CVE-2026-64642","record":{"aliases":["CLEANSTART-2026-FI73865","CLEANSTART-2026-GC88810","ECHO-6bda-043c-2bec","GHSA-6gpp-xcg3-4w24","MINI-9wvx-hc9f-6c35","MINI-c8h8-whv8-5rf4","MINI-r544-fxcq-2cxj","ROOT-APP-NPM-CVE-2026-64642"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Next.js framework","requires_auth":"none","summary":"Attackers can bypass middleware authentication in Next.js App Router applications using Turbopack with a single locale configuration.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"next.js","vendor":"vercel"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-285","name":"Improper Authorization"}],"description":"Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.","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":"Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","id":"CVE-2026-64642","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"vercel:next.js","products":["vercel:next.js"],"type":"auth_bypass","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Next.js: Unauthenticated Disclosure of Internal Server Function endpoints","id":"CVE-2026-64643"},"packages":[{"ecosystem":"npm","fixed":["16.2.11"],"introduced":["16.0.0"],"last_affected":[],"package":"next","purl":null,"source":"GHSA-6gpp-xcg3-4w24"},{"ecosystem":"npm","fixed":["16.2.11"],"introduced":["16.0.0"],"last_affected":[],"package":"next","purl":"pkg:npm/next","source":"GHSA-6gpp-xcg3-4w24"}],"prev":{"headline":"Next.js: Denial of Service in App Router using Server Actions","id":"CVE-2026-64641"},"products":["next.js"],"published":"2026-07-27","related":[{"cvss_score":9.1,"headline":"Authorization Bypass in Next.js Middleware","id":"CVE-2025-29927","kev_date_added":null,"published":"2025-03-21"},{"cvss_score":8.6,"headline":"Next.js: Server-side request forgery in applications using WebSocket upgrades","id":"CVE-2026-44578","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":8.3,"headline":"Next.js: Server-Side Request Forgery in Image Optimization","id":"CVE-2026-94483","kev_date_added":null,"published":"2026-10-02"},{"cvss_score":8.3,"headline":"Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname","id":"CVE-2026-64645","kev_date_added":null,"published":"2026-07-27"},{"cvss_score":8.3,"headline":"Next.js: Server-Side Request Forgery in Server Actions on Custom Servers","id":"CVE-2026-64649","kev_date_added":null,"published":"2026-07-27"},{"cvss_score":8.2,"headline":"Next.js: Denial of Service in App Router using Server Actions","id":"CVE-2026-64641","kev_date_added":null,"published":"2026-07-27"}],"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":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["vercel"]},"summary":"Attackers can bypass middleware authentication in Next.js App Router applications using Turbopack with a single locale configuration.","url":"https://insights.sbomify.com/CVE-2026-64642/"}