CVE-2026-102675
Description
A flaw was found in Electron. When an application registers a custom scheme using file or HTTP protocol handlers with Fetch API support enabled but Cross-Origin Resource Sharing (CORS) disabled, responses remain script-readable across origins. If untrusted content is loaded within the same session, an attacker can exploit this vulnerability to bypass origin restrictions and read sensitive application data, resulting in information disclosure.
Statement
A flaw was found in Electron where responses served via protocol.registerFileProtocol or protocol.registerHttpProtocol for custom schemes registered with supportFetchAPI enabled but corsEnabled disabled remain script-readable across origins. If untrusted content is loaded within the same session, an attacker can exploit this behavior to bypass the same-origin policy and read sensitive application data, resulting in information disclosure.
Mitigation
Ensure custom schemes registered with supportFetchAPI explicitly enable corsEnabled, or avoid loading untrusted web content within sessions where custom protocol schemes with disabled CORS controls are registered.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.4 | N/A | 7.4 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Understanding the Weakness (CWE)
Access Control,Other
Technical Impact: Gain Privileges or Assume Identity; Varies by Context
An attacker can access any functionality that is inadvertently accessible to the source.
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