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TI-2026-39496 Aliases CVE-2026-54673GHSA-p2f4-r6v6-j797

Information disclosure in electron-builder

Priority HIGH 69CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00407 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial electron-builder (electron-userland): 26.15.0builder-util-runtime (electron-userland): 9.7.0+1 more productRed Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
electronelectron-builderbefore 26.15.026.15.0Patch availableCNA
electronbuilder-util-runtimebefore 9.7.09.7.0Patch availableCNA
—builder-util-runtime (npm)before 9.7.09.7.0Patch availableGHSA-p2f4-r6v6-j797
  • electron-builder Vendorelectron Affected before 26.15.0 Fixed in 26.15.0 Patch available CNA
  • builder-util-runtime Vendorelectron Affected before 9.7.0 Fixed in 9.7.0 Patch available CNA
  • builder-util-runtime (npm) Vendor— Affected before 9.7.0 Fixed in 9.7.0 Patch available GHSA-p2f4-r6v6-j797

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:electron:builder-util-runtime:*:*:*:*:*:node.js:*:*before 9.7.0Vulnerableelectron
cpe:2.3:a:electron:electron-builder:*:*:*:*:*:node.js:*:*before 26.15.0Vulnerableelectron
  • cpe:2.3:a:electron:builder-util-runtime:*:*:*:*:*:node.js:*:* Versions before 9.7.0 Vulnerable ·electron
  • cpe:2.3:a:electron:electron-builder:*:*:*:*:*:node.js:*:* Versions before 26.15.0 Vulnerable ·electron

Remediation

  • Fix · CNA electron-builder (electron-userland) Fixed in 26.15.0
  • Fix · CNA builder-util-runtime (electron-userland) Fixed in 9.7.0
  • Fix · GHSA-p2f4-r6v6-j797 builder-util-runtime (npm) Fixed in 9.7.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Build of Podman DesktopAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54673
  2. 2026-10-03 Alias added: GHSA-p2f4-r6v6-j797

References

Exploit 1

Patch 1

Advisory 1

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences