{"answers":{"affected":"3 open source packages ship an affected version, including marimo.","exploited":"There is no known exploitation of CVE-2026-54386 in the wild and no public exploit code.","fix":"Upgrade marimo to 0.23.9 or later.","what":"CVE-2026-54386 is a medium-severity cross-site scripting vulnerability in marimo-team marimo, published on 17 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-2026-54386 and fix it if it is affected.\n\nWhat it is: CVE-2026-54386 is a medium-severity cross-site scripting vulnerability in marimo-team marimo, published on 17 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: There is no known exploitation of CVE-2026-54386 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- marimo (PyPI): affected all versions; fixed in 0.23.9\n- marimo (PyPI): affected all versions; fixed in 0.23.9\n- marimo (PyPI): affected all versions; fixed in 0.23.9\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-2026-54386/ (Markdown: https://insights.sbomify.com/CVE-2026-54386/index.md)","id":"CVE-2026-54386","markdown":"https://insights.sbomify.com/CVE-2026-54386/index.md","name":"CVE-2026-54386","record":{"aliases":["GHSA-8m59-7xv8-735h","PYSEC-2026-2619"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"marimo notebook","requires_auth":"none","summary":"Unauthenticated attackers can inject arbitrary JavaScript via a crafted link, enabling code execution in the victim's browser context.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploiting improper escaping of single quotes in the file query parameter reflected into an inline JavaScript string literal. Attackers can craft a malicious link with a payload beginning with __new__ to bypass the 404 check and inject JavaScript into the page, which executes without Content-Security-Policy restrictions in the origin of a victim's marimo server.","ecosystems":["PyPI"],"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":"marimo \u003c 0.23.9 XSS via file Query Parameter in assets.py","id":"CVE-2026-54386","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Tinyproxy - HTTP Request Smuggling via CL/TE Desynchronization","id":"CVE-2026-54387"},"packages":[{"ecosystem":"PyPI","fixed":["0.23.9"],"introduced":["0"],"last_affected":[],"package":"marimo","purl":null,"source":"GHSA-8m59-7xv8-735h"},{"ecosystem":"PyPI","fixed":["0.23.9"],"introduced":["0"],"last_affected":[],"package":"marimo","purl":"pkg:pypi/marimo","source":"GHSA-8m59-7xv8-735h"},{"ecosystem":"PyPI","fixed":["0.23.9"],"introduced":["0"],"last_affected":[],"package":"marimo","purl":"pkg:pypi/marimo","source":"PYSEC-2026-2619"}],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-54385"},"products":["marimo"],"published":"2026-06-17","related":[],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-10-08","vendors":["marimo-team"]},"summary":"Unauthenticated attackers can inject arbitrary JavaScript via a crafted link, enabling code execution in the victim's browser context.","url":"https://insights.sbomify.com/CVE-2026-54386/"}