Answer in brief
CVE-2026-34774 records a High severity (CVSS 8.1) vulnerability in Electron: Use-after-free in offscreen child window paint callback. The current sources do not mark it as known exploited. The current feed maps electron/electron (generic), Red Hat/podman-desktop-macos-1-0 (generic), Red Hat/podman-desktop-windows-1-0 (generic), Red Hat/rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps electron/electron (generic), Red Hat/podman-desktop-macos-1-0 (generic), Red Hat/podman-desktop-windows-1-0 (generic), Red Hat/rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| electron/electrongeneric | <39.8.1 || >=40.0.0-alpha.1 <40.7.0 || >=41.0.0-alpha.1 <41.0.0 | 39.8.1, 40.7.0, 41.0.0 |
| Red Hat/podman-desktop-macos-1-0generic | * | Not reported |
| Red Hat/podman-desktop-windows-1-0generic | * | Not reported |
| Red Hat/rhdesktop/rh-podman-desktop-ext-openshift-local-rhel10generic | * | Not reported |
Published upstream
Apr 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.
Quoted source text, attributed separately from HOL analysis.