CVE-2026-54673
electron-updater: Cross-origin redirect leaks `PRIVATE-TOKEN` and mixed-case `Authorization` credentials in `builder-util-runtime`
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-200 |
| Vendor | electron-userland |
| Product | electron-builder |
| Published | Jun 30, 2026 |
| Last Updated | Jun 30, 2026 |
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Affected Versions
electron-userland / electron-builder
< 26.15.0
electron-userland / builder-util-runtime
< 9.7.0