CVE-2026-54673: Electron Builder-Util-Runtime

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

electron-updater allows for automatic updates for Electron apps. Prior to 9.7.0, the HTTP redirect handler (HttpExecutor.prepareRedirectUrlOptions) only stripped a credential header whose key string matched exactly lowercase "authorization", exposing credentials. Other credential-bearing headers — most notably PRIVATE-TOKEN (used by GitLab's personal access token flow) and mixed-case Authorization (used by GitLab's Bearer/OAuth flow) — were not stripped and could be forwarded to an attacker-controlled cross-origin redirect destination. This issue has been fixed in version 9.7.0.

Affected products

• Electron Builder-Util-Runtime: before 9.7.0 (fixed in 9.7.0)
• Electron Electron-Builder: before 26.15.0 (fixed in 26.15.0)

Published 2026-06-30. Last modified 2026-08-26.