{"answers":{"affected":"2 open source packages ship an affected version, including react-router. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53667 in the wild and no public exploit code.","fix":"Upgrade react-router to 7.18.0 or later.","what":"CVE-2026-53667 is a medium-severity cross-site scripting vulnerability in remix-run react-router, published on 27 Jul 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-2026-53667 and fix it if it is affected.\n\nWhat it is: CVE-2026-53667 is a medium-severity cross-site scripting vulnerability in remix-run react-router, published on 27 Jul 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-2026-53667 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- react-router (npm): affected from 7.11.0; fixed in 7.18.0\n- react-router (npm): affected from 7.11.0; fixed in 7.18.0\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-2026-53667/ (Markdown: https://insights.sbomify.com/CVE-2026-53667/index.md)","id":"CVE-2026-53667","markdown":"https://insights.sbomify.com/CVE-2026-53667/index.md","name":"CVE-2026-53667","record":{"aliases":["GHSA-h8fp-f39c-q6mh","ROOT-APP-NPM-CVE-2026-53667"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"React Router library","requires_auth":"none","summary":"Attackers can execute scripts via untrusted redirects in React Router when using unstable RSC APIs, requiring an upgrade to the latest version.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"react-router","vendor":"shopify"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.","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":"React Router: RSCErrorHandler Missing Protocol Validation (XSS)","id":"CVE-2026-53667","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"React Router: Open redirect can lead to XSS","id":"CVE-2026-53668"},"packages":[{"ecosystem":"npm","fixed":["7.18.0"],"introduced":["7.11.0"],"last_affected":[],"package":"react-router","purl":null,"source":"GHSA-h8fp-f39c-q6mh"},{"ecosystem":"npm","fixed":["7.18.0"],"introduced":["7.11.0"],"last_affected":[],"package":"react-router","purl":"pkg:npm/react-router","source":"GHSA-h8fp-f39c-q6mh"}],"prev":{"headline":"React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration","id":"CVE-2026-53666"},"products":["react-router"],"published":"2026-07-27","related":[{"cvss_score":8.7,"headline":"React Router: Unauthenticated Denial of Service via Inefficient Route Matching","id":"CVE-2026-55685","kev_date_added":null,"published":"2026-07-27"},{"cvss_score":8.2,"headline":"React Router SSR XSS in ScrollRestoration","id":"CVE-2026-21884","kev_date_added":null,"published":"2026-01-10"},{"cvss_score":8.1,"headline":"React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE","id":"CVE-2026-42211","kev_date_added":null,"published":"2026-06-02"},{"cvss_score":8,"headline":"React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets","id":"CVE-2026-33245","kev_date_added":null,"published":"2026-06-02"},{"cvss_score":8,"headline":"React Router vulnerable to XSS via Open Redirects","id":"CVE-2026-22029","kev_date_added":null,"published":"2026-01-10"},{"cvss_score":7.6,"headline":"React Router has XSS Vulnerability","id":"CVE-2025-59057","kev_date_added":null,"published":"2026-01-10"},{"cvss_score":7.5,"headline":"React Router vulnerable to Denial of Service via reflected user input in single-fetch","id":"CVE-2026-34077","kev_date_added":null,"published":"2026-06-02"}],"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":["remix-run"]},"summary":"Attackers can execute scripts via untrusted redirects in React Router when using unstable RSC APIs, requiring an upgrade to the latest version.","url":"https://insights.sbomify.com/CVE-2026-53667/"}