{"id":"GHSA-9wfr-w7mm-pc7f","summary":"Electron: Renderer command-line switch injection via undocumented commandLineSwitches webPreference","details":"### Impact\nAn undocumented `commandLineSwitches` webPreference allowed arbitrary switches to be appended to the renderer process command line. Apps that construct `webPreferences` by spreading untrusted configuration objects may inadvertently allow an attacker to inject switches that disable renderer sandboxing or web security controls.\n\nApps are only affected if they construct `webPreferences` from external or untrusted input without an allowlist. Apps that use a fixed, hardcoded `webPreferences` object are not affected.\n\n### Workarounds\nDo not spread untrusted input into `webPreferences`. Use an explicit allowlist of permitted preference keys when constructing `BrowserWindow` or `webContents` options from external configuration.\n\n### Fixed Versions\n* `41.0.0-beta.8`\n* `40.7.0`\n* `39.8.0`\n* `38.8.6`\n\n### For more information\nIf there are any questions or comments about this advisory, send an email to [security@electronjs.org](mailto:security@electronjs.org)","aliases":["CVE-2026-34769"],"modified":"2026-04-06T23:19:40.585044Z","published":"2026-04-03T02:39:15Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-04-03T02:39:15Z","nvd_published_at":"2026-04-04T00:16:17Z","cwe_ids":["CWE-88","CWE-912"],"severity":"HIGH"},"references":[{"type":"WEB","url":"https://github.com/electron/electron/security/advisories/GHSA-9wfr-w7mm-pc7f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34769"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"affected":[{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"38.8.6"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9wfr-w7mm-pc7f/GHSA-9wfr-w7mm-pc7f.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"39.0.0-alpha.1"},{"fixed":"39.8.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9wfr-w7mm-pc7f/GHSA-9wfr-w7mm-pc7f.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"40.0.0-alpha.1"},{"fixed":"40.7.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9wfr-w7mm-pc7f/GHSA-9wfr-w7mm-pc7f.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"41.0.0-alpha.1"},{"fixed":"41.0.0-beta.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-9wfr-w7mm-pc7f/GHSA-9wfr-w7mm-pc7f.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H"}]}