{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39866 exists.","fix":"No fix has been published for CVE-2026-39866 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39866 is a high-severity command injection vulnerability in LawnchairLauncher lawnchair, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-39866 and fix it if it is affected.\n\nWhat it is: CVE-2026-39866 is a high-severity command injection vulnerability in LawnchairLauncher lawnchair, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39866 exists.\n\nAffected product: LawnchairLauncher lawnchair. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-39866/ (Markdown: https://insights.sbomify.com/CVE-2026-39866/index.md)","id":"CVE-2026-39866","markdown":"https://insights.sbomify.com/CVE-2026-39866/index.md","name":"CVE-2026-39866","record":{"aliases":["GHSA-9prc-pp2c-3427"],"analysis":{"component_type":"mobile_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Android home app","requires_auth":"low_privilege","summary":"Command injection in the release workflow allows arbitrary code execution, requiring a patch to secure the build process.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"lawnchair","vendor":"lawnchair"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"}],"description":"Lawnchair is a free, open-source home app for Android. Prior to commit fcba413f55dd47f8a3921445252849126c6266b2, command injection in release_update.yml workflow dispatch input allows arbitrary code execution. Commit fcba413f55dd47f8a3921445252849126c6266b2 patches the issue.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-04-11","github_poc":2,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-06T18:43:51Z","kind":"github_poc","ref":"https://github.com/pvharmo2/gha-lab-360f77d0d4","stars":1,"title":"Authorized security-research lab: reproduction of CVE-2026-39866 (GHSA-9prc-pp2c-3427) — workflow_dispatch input template injection in .github/workflows/release_update.yml of LawnchairLauncher/lawnchair @ b089bae8c007f36a8ce0346725182a107d97cd05. Snapshot pinned to the vulnerable commit; owner-gated sign-info step retargeted for the lab."},{"date":"2026-04-11T15:01:15Z","kind":"github_poc","ref":"https://github.com/abhayclasher/CVE-2026-39866","stars":0,"title":null}],"tier":"weaponised"},"has_fix":false,"headline":"Lawnchair vulnerable to Command Injection via unquoted workflow dispatch input in release_update.yml","id":"CVE-2026-39866","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Memory corruption in iOS and iPadOS","id":"CVE-2026-39868"},"packages":[],"prev":{"headline":"Axios HTTP/2 Session Cleanup State Corruption Vulnerability","id":"CVE-2026-39865"},"products":["lawnchair"],"published":"2026-04-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-25","vendors":["LawnchairLauncher"]},"summary":"Command injection in the release workflow allows arbitrary code execution, requiring a patch to secure the build process.","url":"https://insights.sbomify.com/CVE-2026-39866/"}