{"answers":{"affected":"2 open source packages ship an affected version, including astro. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54298 exists.","fix":"Upgrade astro to 6.4.6 or later.","what":"CVE-2026-54298 is a medium-severity cross-site scripting vulnerability in withastro astro, published on 22 Jun 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-2026-54298 and fix it if it is affected.\n\nWhat it is: CVE-2026-54298 is a medium-severity cross-site scripting vulnerability in withastro astro, published on 22 Jun 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54298 exists.\n\nAffected packages and fixed versions:\n- astro (npm): affected all versions; fixed in 6.4.6\n- astro (npm): affected all versions; fixed in 6.4.6\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-2026-54298/ (Markdown: https://insights.sbomify.com/CVE-2026-54298/index.md)","id":"CVE-2026-54298","markdown":"https://insights.sbomify.com/CVE-2026-54298/index.md","name":"CVE-2026-54298","record":{"aliases":["CLSA-2026-1784596276","CLSA-2026-1784596300","CLSA-2026-1792161691","CLSA-2026-1792161695","GHSA-jrpj-wcv7-9fh9"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Astro web framework","requires_auth":"none","summary":"Attackers can inject malicious scripts via unescaped attribute names in spread props, requiring developers to upgrade Astro.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"astro","vendor":"astro"}],"cvss":{"score":4.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Astro is a web framework. Prior to 6.4.6, the spreadAttributes function in Astro's server-side rendering pipeline iterates over object keys and passes them directly to addAttribute, which interpolates the key into the HTML output without escaping. When a developer uses the spread syntax {...props} on an HTML element and the object keys come from an untrusted source (API, CMS, URL parameters), an attacker can inject arbitrary HTML attributes including event handlers like onmousemove, onclick, or break out of the attribute context entirely to inject new elements. This vulnerability is fixed in 6.4.6.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Astro: XSS via Unescaped Attribute Names in Spread Props","id":"CVE-2026-54298","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Astro: Host header SSRF in prerendered error page fetch","id":"CVE-2026-54299"},"packages":[{"ecosystem":"npm","fixed":["6.4.6"],"introduced":["0"],"last_affected":[],"package":"astro","purl":null,"source":"GHSA-jrpj-wcv7-9fh9"},{"ecosystem":"npm","fixed":["6.4.6"],"introduced":["0"],"last_affected":[],"package":"astro","purl":"pkg:npm/astro","source":"GHSA-jrpj-wcv7-9fh9"}],"prev":{"headline":"Faraday: Uncontrolled recursion in NestedParamsEncoder allows stack exhaustion DoS via deeply nested query parameters","id":"CVE-2026-54297"},"products":["astro"],"published":"2026-06-22","related":[{"cvss_score":7.8,"headline":"Server source code is exposed to the public if sourcemaps are enabled","id":"CVE-2024-56159","kev_date_added":null,"published":"2024-12-19"},{"cvss_score":7.5,"headline":"Astro: Host header SSRF in prerendered error page fetch","id":"CVE-2026-54299","kev_date_added":null,"published":"2026-06-22"},{"cvss_score":7.2,"headline":"astro allows bypass of image proxy domain validation leading to SSRF and potential XSS","id":"CVE-2025-59837","kev_date_added":null,"published":"2025-10-28"},{"cvss_score":7.1,"headline":"Astro: Reflected XSS via unescaped slot name","id":"CVE-2026-50146","kev_date_added":null,"published":"2026-06-22"},{"cvss_score":7.1,"headline":"Astro is vulnerable to Reflected XSS via the server islands feature","id":"CVE-2025-64764","kev_date_added":null,"published":"2025-11-19"},{"cvss_score":6.9,"headline":"Astro middleware authentication checks based on url.pathname can be bypassed via url encoded values","id":"CVE-2025-64765","kev_date_added":null,"published":"2025-11-19"},{"cvss_score":6.9,"headline":"Unauthorized third-party images in Astro’s _image endpoint","id":"CVE-2025-55303","kev_date_added":null,"published":"2025-08-19"}],"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["withastro"]},"summary":"Attackers can inject malicious scripts via unescaped attribute names in spread props, requiring developers to upgrade Astro.","url":"https://insights.sbomify.com/CVE-2026-54298/"}