CVE-2026-34772
Electron: Use-after-free in download save dialog callback
CVE-2026-34772 is a medium vulnerability (CVSS 5.8) in Electron, published April 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 11th percentile. Fixed in electron 38.8.6.
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Electron: Use-after-free in download save dialog callback
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
- Record
CVE-2026-34772- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2026-18943
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
- Record
EUVD-2026-18943- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9w97-2464-8783
Electron: Use-after-free in download save dialog callback
Impact
Apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption.
Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected.
Workarounds
Avoid destroying sessions while a download save dialog may be open. Cancel pending downloads before session teardown.
Fixed Versions
41.0.0-beta.740.7.039.8.038.8.6
For more information
If there are any questions or comments about this advisory, please email [email protected]
- Record
GHSA-9w97-2464-8783- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
- Record
CVE-2026-34772- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
Electron: Use-after-free in download save dialog callback
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
- Record
CVE-2026-34772- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - Weakness
- CWE-416
- Updated
- 2026-11-02
OSVGHSA-9w97-2464-8783
Electron: Use-after-free in download save dialog callback
Impact
Apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption.
Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected.
Workarounds
Avoid destroying sessions while a download save dialog may be open. Cancel pending downloads before session teardown.
Fixed Versions
41.0.0-beta.740.7.039.8.038.8.6
For more information
If there are any questions or comments about this advisory, please email [email protected]
- Record
GHSA-9w97-2464-8783- CVSS 3.1
- 5.8 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
Affected packages
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-02 | created | CVE List, EUVD, GitHub Advisories, NVD, OSV |