{"answers":{"affected":"2 open source packages ship an affected version, including svelte. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-42573 in the wild and no public exploit code.","fix":"Upgrade svelte to 5.55.7 or later.","what":"CVE-2026-42573 is a medium-severity cross-site scripting vulnerability in sveltejs svelte, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-42573 and fix it if it is affected.\n\nWhat it is: CVE-2026-42573 is a medium-severity cross-site scripting vulnerability in sveltejs svelte, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-42573 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- svelte (npm): affected all versions; fixed in 5.55.7\n- svelte (npm): affected all versions; fixed in 5.55.7\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-2026-42573/ (Markdown: https://insights.sbomify.com/CVE-2026-42573/index.md)","id":"CVE-2026-42573","markdown":"https://insights.sbomify.com/CVE-2026-42573/index.md","name":"CVE-2026-42573","record":{"aliases":["GHSA-rcqx-6q8c-2c42"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Svelte web framework","requires_auth":"low_privilege","summary":"Attackers can exploit DOM clobbering in Svelte to execute arbitrary scripts, requiring developers to upgrade the framework.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"svelte","vendor":"svelte"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.","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":"Svelte: XSS via DOM Clobbering of Internal Framework State","id":"CVE-2026-42573","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root","id":"CVE-2026-42574"},"packages":[{"ecosystem":"npm","fixed":["5.55.7"],"introduced":["0"],"last_affected":[],"package":"svelte","purl":null,"source":"GHSA-rcqx-6q8c-2c42"},{"ecosystem":"npm","fixed":["5.55.7"],"introduced":["0"],"last_affected":[],"package":"svelte","purl":"pkg:npm/svelte","source":"GHSA-rcqx-6q8c-2c42"}],"prev":{"headline":"Hatchet: Cross-tenant information disclosure in `listTasksByDAGIds`","id":"CVE-2026-42572"},"products":["svelte"],"published":"2026-06-09","related":[{"cvss_score":7.8,"headline":"Code injection in n/a","id":"CVE-2021-29261","kev_date_added":null,"published":"2021-04-05"},{"cvss_score":5.9,"headline":"Svelte: ReDoS in `\u003csvelte:element\u003e` Tag Validation","id":"CVE-2026-42567","kev_date_added":null,"published":"2026-06-09"},{"cvss_score":5.4,"headline":"Potential mXSS vulnerability due to improper HTML escaping in svelte","id":"CVE-2024-45047","kev_date_added":null,"published":"2024-08-30"},{"cvss_score":5.4,"headline":"Cross-site Scripting (XSS)","id":"CVE-2022-25875","kev_date_added":null,"published":"2022-07-12"},{"cvss_score":5.3,"headline":"Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`","id":"CVE-2026-27901","kev_date_added":null,"published":"2026-02-26"},{"cvss_score":5.3,"headline":"Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers","id":"CVE-2026-27902","kev_date_added":null,"published":"2026-02-26"}],"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":"2026-07-15","vendors":["sveltejs"]},"summary":"Attackers can exploit DOM clobbering in Svelte to execute arbitrary scripts, requiring developers to upgrade the framework.","url":"https://insights.sbomify.com/CVE-2026-42573/"}