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GHSA-9w97-2464-8783 CVE-2026-34772

Electron: Use-after-free in download save dialog callback

High npm
Severity
5.8 / 10
High · CVSS 3.1
Exploit chance (EPSS)
0.21%
Chance of exploitation in the next 30 days. Higher than 11.52% of scored vulnerabilities.
Known exploited
No
Not in CISA's catalog
Weakness
CWE-416 Use After Free
Fix
38.8.6
Upgrade electron to this version or later

Description

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.7
  • 40.7.0
  • 39.8.0
  • 38.8.6

For more information

If there are any questions or comments about this advisory, please email security@electronjs.org

Affected versions

npm

PackageVulnerableFixed in
electron
< 38.8.6
38.8.6
electron
>= 39.0.0-alpha.1, < 39.8.0
39.8.0
electron
>= 40.0.0-alpha.1, < 40.7.0
40.7.0
electron
>= 41.0.0-alpha.1, < 41.0.0-beta.7
41.0.0-beta.7

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

electron npm → 38.8.6

npm
npm install electron@38.8.6
yarn
yarn add electron@38.8.6
pnpm
pnpm add electron@38.8.6

Severity breakdown

CVSS 3.1 5.8

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L

Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

Weakness

CWE-416: Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

How to prevent it
  • Architecture and Design: Choose a language that provides automatic memory management.
  • Implementation: When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.

References

Advisories

Packages

Other links

Timeline

  1. Published
  2. Last updated by the source
  3. Latest EPSS score
AdvisorySeverityWhy it's related
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GHSA-fw47-9c62-h3vw
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Medium Also affects electron
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