Answer in brief
CVE-2026-70602 records a Medium severity (CVSS 6.6) vulnerability in Electron: Extension tab APIs operate across session boundaries. 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 6.6. 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 | < 39.8.8 || >= 40.0.0-alpha.1, < 40.9.0 || >= 41.0.0-alpha.1, < 41.2.1 || >= 42.0.0-alpha.1, < 42.0.0-beta.3 | Not reported |
| electronnpm | <39.8.8 | 39.8.8 |
| electronnpm | >=40.0.0-alpha.1,<40.9.0 | 40.9.0 |
| electronnpm | >=41.0.0-alpha.1,<41.2.1 | 41.2.1 |
| electronnpm | >=42.0.0-alpha.1,<42.0.0-beta.3 | 42.0.0-beta.3 |
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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-70602 records a Medium severity (CVSS 6.6) vulnerability in Electron: Extension tab APIs operate across session boundaries. 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 6.6. 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 | < 39.8.8 || >= 40.0.0-alpha.1, < 40.9.0 || >= 41.0.0-alpha.1, < 41.2.1 || >= 42.0.0-alpha.1, < 42.0.0-beta.3 | Not reported |
| electronnpm | <39.8.8 | 39.8.8 |
| electronnpm | >=40.0.0-alpha.1,<40.9.0 | 40.9.0 |
| electronnpm | >=41.0.0-alpha.1,<41.2.1 | 41.2.1 |
| electronnpm | >=42.0.0-alpha.1,<42.0.0-beta.3 | 42.0.0-beta.3 |
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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Quoted source text, attributed separately from HOL analysis.