{"answers":{"affected":"4 open source packages ship an affected version, including next. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44581 in the wild and no public exploit code.","fix":"Upgrade next to a fixed version for your release line: 15.5.16 or 16.2.5.","what":"CVE-2026-44581 is a medium-severity cross-site scripting vulnerability in Vercel Next.js, published on 13 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-44581 and fix it if it is affected.\n\nWhat it is: CVE-2026-44581 is a medium-severity cross-site scripting vulnerability in Vercel Next.js, published on 13 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-44581 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- next (npm): affected from 13.4.0; fixed in 15.5.16\n- next (npm): affected from 13.4.0; fixed in 15.5.16\n- next (npm): affected from 16.0.0; fixed in 16.2.5\n- next (npm): affected from 16.0.0; fixed in 16.2.5\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-2026-44581/ (Markdown: https://insights.sbomify.com/CVE-2026-44581/index.md)","id":"CVE-2026-44581","markdown":"https://insights.sbomify.com/CVE-2026-44581/index.md","name":"CVE-2026-44581","record":{"aliases":["CLEANSTART-2026-UW85548","CLEANSTART-2026-WK40979","GHSA-ffhc-5mcf-pf4q","MINI-95vg-fhjh-rqfc","MINI-mhwm-g87f-3xj3","MINI-v5fq-qjgx-x55x","MINI-x9qg-h2m6-qm2j","ROOT-APP-NPM-CVE-2026-44581"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Next.js framework","requires_auth":"none","summary":"Attackers can poison cached responses to execute scripts in Next.js App Router applications using CSP nonces, affecting web developers and site visitors.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"next.js","vendor":"vercel"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Next.js is a React framework for building full-stack web applications. From 13.4.0 to before 15.5.16 and 16.2.5, App Router applications that rely on CSP nonces can be vulnerable to stored cross-site scripting when deployed behind shared caches. In affected versions, malformed nonce values derived from request headers could be reflected into rendered HTML in an unsafe way, allowing an attacker to poison cached responses and cause script execution for later visitors. This vulnerability is fixed in 15.5.16 and 16.2.5.","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: Cross-site scripting in App Router applications using CSP nonces","id":"CVE-2026-44581","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"vercel:next.js","products":["vercel:next.js"],"type":"xss","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Next.js: Cache poisoning via collisions in React Server Component cache-busting","id":"CVE-2026-44582"},"packages":[{"ecosystem":"npm","fixed":["15.5.16"],"introduced":["13.4.0"],"last_affected":[],"package":"next","purl":null,"source":"GHSA-ffhc-5mcf-pf4q"},{"ecosystem":"npm","fixed":["15.5.16"],"introduced":["13.4.0"],"last_affected":[],"package":"next","purl":"pkg:npm/next","source":"GHSA-ffhc-5mcf-pf4q"},{"ecosystem":"npm","fixed":["16.2.5"],"introduced":["16.0.0"],"last_affected":[],"package":"next","purl":null,"source":"GHSA-ffhc-5mcf-pf4q"},{"ecosystem":"npm","fixed":["16.2.5"],"introduced":["16.0.0"],"last_affected":[],"package":"next","purl":"pkg:npm/next","source":"GHSA-ffhc-5mcf-pf4q"}],"prev":{"headline":"Next.js: Cross-site scripting in beforeInteractive scripts with untrusted input","id":"CVE-2026-44580"},"products":["next.js"],"published":"2026-05-13","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: Middleware / Proxy bypass in App Router applications using Turbopack and single locale","id":"CVE-2026-64642","kev_date_added":null,"published":"2026-07-27"},{"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":"2026-05-18","vendors":["vercel"]},"summary":"Attackers can poison cached responses to execute scripts in Next.js App Router applications using CSP nonces, affecting web developers and site visitors.","url":"https://insights.sbomify.com/CVE-2026-44581/"}