{"answers":{"affected":"3 open source packages ship an affected version, including nicegui. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-27156 in the wild and no public exploit code.","fix":"Upgrade nicegui to 3.8.0 or later.","what":"CVE-2026-27156 is a medium-severity cross-site scripting vulnerability in zauberzeug nicegui, published on 24 Feb 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-2026-27156 and fix it if it is affected.\n\nWhat it is: CVE-2026-27156 is a medium-severity cross-site scripting vulnerability in zauberzeug nicegui, published on 24 Feb 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-2026-27156 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nicegui (PyPI): affected all versions; fixed in 3.8.0\n- nicegui (PyPI): affected all versions; fixed in 3.8.0\n- nicegui (PyPI): affected all versions; fixed in 3.8.0\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-2026-27156/ (Markdown: https://insights.sbomify.com/CVE-2026-27156/index.md)","id":"CVE-2026-27156","markdown":"https://insights.sbomify.com/CVE-2026-27156/index.md","name":"CVE-2026-27156","record":{"aliases":["GHSA-78qv-3mpx-9cqq","PYSEC-2026-2232"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Python UI framework","requires_auth":"none","summary":"Attackers can inject arbitrary JavaScript via user-controlled method names in NiceGUI APIs, leading to XSS in victim browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nicegui","vendor":"zauberzeug"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/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":"NiceGUI is a Python-based UI framework. Prior to version 3.8.0, several NiceGUI APIs that execute methods on client-side elements (`Element.run_method()`, `AgGrid.run_grid_method()`, `EChart.run_chart_method()`, and others) use an `eval()` fallback in the JavaScript-side `runMethod()` function. When user-controlled input is passed as the method name, an attacker can inject arbitrary JavaScript that executes in the victim's browser. Additionally, `Element.run_method()` and `Element.get_computed_prop()` used string interpolation instead of `json.dumps()` for the method/property name, allowing quote injection to break out of the intended string context. Version 3.8.0 contains a fix.","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":"NiceGUI has XSS via Code Injection","id":"CVE-2026-27156","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Unauthenticated Information Disclosure via .htaccess Reliance in Sensitive Directories","id":"CVE-2026-27161"},"packages":[{"ecosystem":"PyPI","fixed":["3.8.0"],"introduced":["0"],"last_affected":[],"package":"nicegui","purl":null,"source":"GHSA-78qv-3mpx-9cqq"},{"ecosystem":"PyPI","fixed":["3.8.0"],"introduced":["0"],"last_affected":[],"package":"nicegui","purl":"pkg:pypi/nicegui","source":"GHSA-78qv-3mpx-9cqq"},{"ecosystem":"PyPI","fixed":["3.8.0"],"introduced":["0"],"last_affected":[],"package":"nicegui","purl":"pkg:pypi/nicegui","source":"PYSEC-2026-2232"}],"prev":{"headline":"Discourse has XSS when editing a malicious post","id":"CVE-2026-27154"},"products":["nicegui"],"published":"2026-02-24","related":[{"cvss_score":7.5,"headline":"NiceGUI's Path Traversal via Unsanitized FileUpload.name Enables Arbitrary File Write","id":"CVE-2026-25732","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":7.5,"headline":"NiceGUI Path Traversal Vulnerability in app.add_media_files() Allows Arbitrary File Reading","id":"CVE-2025-66645","kev_date_added":null,"published":"2025-12-09"},{"cvss_score":7.2,"headline":"Zero-click XSS in all NiceGUI apps which uses `ui.sub_pages`","id":"CVE-2026-21873","kev_date_added":null,"published":"2026-01-08"},{"cvss_score":6.9,"headline":"NiceGUI's unvalidated chunk size parameter in media routes can cause memory exhaustion","id":"CVE-2026-33332","kev_date_added":null,"published":"2026-03-24"},{"cvss_score":6.1,"headline":"NiceGUI's XSS vulnerability in ui.markdown() allows arbitrary JavaScript execution through unsanitized HTML content","id":"CVE-2026-25516","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":6.1,"headline":"NiceGUI is vulnerable to XSS via Unescaped URL in ui.navigate.history.push() / replace()","id":"CVE-2026-21871","kev_date_added":null,"published":"2026-01-08"}],"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":"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":"2026-02-26","vendors":["zauberzeug"]},"summary":"Attackers can inject arbitrary JavaScript via user-controlled method names in NiceGUI APIs, leading to XSS in victim browsers.","url":"https://insights.sbomify.com/CVE-2026-27156/"}