Medium [CVE-2026-54673] Information disclosure via unstripped credential headers during HTTP redirects

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.

This vulnerability allows a remote attacker to obtain sensitive user credentials. When an Electron application performs an HTTP redirect, the electron-updater's redirect handler fails to strip certain credential-bearing headers, such as PRIVATE-TOKEN or mixed-case Authorization headers.

This oversight can lead to these credentials being forwarded to an attacker-controlled destination, resulting in information disclosure. This could allow an attacker who controls a redirect destination to capture authentication credentials used during application update checks.

Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N). Weakness: CWE-201.

Affected Red Hat products: Red Hat Build of Podman Desktop; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.