{"id":"CVE-2026-34781","aliases":["GHSA-f37v-82c4-4x64"],"url":"https://o3.security/vulnerability/CVE-2026-34781","summary":"Electron crashes in clipboard.readImage() on malformed clipboard image data","details":"### Impact\nApps that call `clipboard.readImage()` may be vulnerable to a denial of service. If the system clipboard contains image data that fails to decode, the resulting null bitmap is passed unchecked to image construction, triggering a controlled abort and crashing the process.\n\nApps are only affected if they call `clipboard.readImage()`. Apps that do not read images from the clipboard are not affected. This issue does not allow memory corruption or code execution.\n\n### Workarounds\nValidate that the clipboard contains image data via `clipboard.availableFormats()` before calling `clipboard.readImage()`. Note this only narrows the window — upgrading to a fixed version is recommended.\n\n### Fixed Versions\n* `42.0.0-alpha.5`\n* `41.1.0`\n* `40.8.5`\n* `39.8.5`\n\n### For more information\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)","published":"2026-04-07T21:20:12.517Z","modified":"2026-08-12T16:23:49.306715Z","cvss":{"score":2.8,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"39.8.5"},{"ecosystem":"npm","name":"electron","fixedVersion":"40.8.5"},{"ecosystem":"npm","name":"electron","fixedVersion":"41.1.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"42.0.0-alpha.5"}],"fix":{"url":"https://github.com/electron/electron/pull/50475","label":"electron/electron#50475"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34781.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-f37v-82c4-4x64"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34781"},{"type":"WEB","url":"https://github.com/electron/electron/pull/50475"},{"type":"WEB","url":"https://github.com/electron/electron/commit/a48f03fb8d03933547281ddb2dbb6c6b9e705287"},{"type":"PACKAGE","url":"https://github.com/electron/electron"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v39.8.5"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v40.8.5"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v41.1.0"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v42.0.0-alpha.5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:23:49.306715Z"}}