CVE-2026-34781
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, apps 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. Apps 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. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
electronnpm | < 39.8.5 | 39.8.5 |
electronnpm | >= 40.0.0-alpha.1, < 40.8.5 | 40.8.5 |
electronnpm | >= 41.0.0-alpha.1, < 41.1.0 | 41.1.0 |
electronnpm | >= 42.0.0-alpha.1, < 42.0.0-alpha.5 | 42.0.0-alpha.5 |
Affected products
6cpe:2.3:a:electronjs:electron:41.2.0:*:*:*:*:node.js:*:*+ 5 more
- cpe:2.3:a:electronjs:electron:41.2.0:*:*:*:*:node.js:*:*
- cpe:2.3:a:electronjs:electron:42.0.0:alpha1:*:*:*:node.js:*:*
- cpe:2.3:a:electronjs:electron:42.0.0:alpha2:*:*:*:node.js:*:*
- cpe:2.3:a:electronjs:electron:42.0.0:alpha3:*:*:*:node.js:*:*
- cpe:2.3:a:electronjs:electron:42.0.0:alpha4:*:*:*:node.js:*:*
- cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*range: <=39.8.4
Patches
1a48f03fb8d03fix: crash in clipboard.readImage() on malformed image data (#50475)
1 file changed · +5 −1
shell/common/api/electron_api_clipboard.cc+5 −1 modified@@ -378,7 +378,11 @@ gfx::Image Clipboard::ReadImage(gin::Arguments* const args) { [](std::optional<gfx::Image>* image, base::RepeatingClosure cb, const std::vector<uint8_t>& result) { SkBitmap bitmap = gfx::PNGCodec::Decode(result); - image->emplace(gfx::Image::CreateFrom1xBitmap(bitmap)); + if (bitmap.isNull()) { + image->emplace(); + } else { + image->emplace(gfx::Image::CreateFrom1xBitmap(bitmap)); + } std::move(cb).Run(); }, &image, std::move(callback)));
Vulnerability mechanics
Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
9- github.com/advisories/GHSA-f37v-82c4-4x64ghsaADVISORY
- github.com/electron/electron/security/advisories/GHSA-f37v-82c4-4x64nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-34781ghsaADVISORY
- github.com/electron/electron/commit/a48f03fb8d03933547281ddb2dbb6c6b9e705287ghsaWEB
- github.com/electron/electron/pull/50475ghsaWEB
- github.com/electron/electron/releases/tag/v39.8.5ghsaWEB
- github.com/electron/electron/releases/tag/v40.8.5ghsaWEB
- github.com/electron/electron/releases/tag/v41.1.0ghsaWEB
- github.com/electron/electron/releases/tag/v42.0.0-alpha.5ghsaWEB
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