Answer in brief
CVE-2026-70604 records a High severity (CVSS 7.4) vulnerability in Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads. The current sources do not mark it as known exploited. The current feed maps electron/electron (generic), electron (npm), electron (npm), electron (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps electron/electron (generic), electron (npm), electron (npm), electron (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| electron/electrongeneric | < 39.8.10 || >= 40.0.0-alpha.1, < 40.9.3 || >= 41.0.0-alpha.1, < 41.4.0 || >= 42.0.0-alpha.1, < 42.0.0 | Not reported |
| electronnpm | >=42.0.0-alpha.1,<42.0.0 | 42.0.0 |
| electronnpm | >=41.0.0-alpha.1,<41.4.0 | 41.4.0 |
| electronnpm | >=40.0.0-alpha.1,<40.9.3 | 40.9.3 |
| electronnpm | <39.8.10 | 39.8.10 |
Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-70604 records a High severity (CVSS 7.4) vulnerability in Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads. The current sources do not mark it as known exploited. The current feed maps electron/electron (generic), electron (npm), electron (npm), electron (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps electron/electron (generic), electron (npm), electron (npm), electron (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| electron/electrongeneric | < 39.8.10 || >= 40.0.0-alpha.1, < 40.9.3 || >= 41.0.0-alpha.1, < 41.4.0 || >= 42.0.0-alpha.1, < 42.0.0 | Not reported |
| electronnpm | >=42.0.0-alpha.1,<42.0.0 | 42.0.0 |
| electronnpm | >=41.0.0-alpha.1,<41.4.0 | 41.4.0 |
| electronnpm | >=40.0.0-alpha.1,<40.9.3 | 40.9.3 |
| electronnpm | <39.8.10 | 39.8.10 |
Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.
Quoted source text, attributed separately from HOL analysis.