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Review reviewHigh

CVE-2026-34774

electron electron, Red Hat Build of Podman Desktop, Red Hat Build of Podman Desktop - Tech Preview

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 wind...

CVSS
8.1
EPSS
0.44%
36.5% percentile
CISA KEV
Not listed
Published
2026.04.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.44%
Technical severityCVSS 8.1

Vulnerability overview

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 wind...

Affected product and versions

Product
electron electron, Red Hat Build of Podman Desktop, Red Hat Build of Podman Desktop - Tech Preview
Affected versions
>= < 39.8.1, >= >= 40.0.0-alpha.1, < 40.7.0, >= >= 41.0.0-alpha.1, < 41.0.0, < 39.8.1, >= 40.0.0 < 40.7.0, 41.0.0
Fixed versions
39.8.1, 40.7.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that electron electron, Red Hat Build of Podman Desktop, Red Hat Build of Podman Desktop - Tech Preview and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416, CWE-825
CVE-2026-34774 — electron electron, Red Hat Build of Podman Desktop, Red Hat Build of Podman Desktop - Tech Preview | SECUFOCUS NOW