Answer in brief
CVE-2026-70606 records a Medium severity (CVSS 5.9) vulnerability in Electron: ProtocolResponse.url reuses the default session cache instead of the registering session. 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 5.9. 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 | >= 40.0.0-alpha.1, < 40.10.6 || >= 41.0.0-alpha.1, < 41.9.1 || >= 42.0.0-alpha.1, < 42.5.1 || >= 43.0.0-alpha.1, < 43.0.0 | Not reported |
| electronnpm | >=43.0.0-alpha.1,<43.0.0 | 43.0.0 |
| electronnpm | >=42.0.0-alpha.1,<42.5.1 | 42.5.1 |
| electronnpm | >=41.0.0-alpha.1,<41.9.1 | 41.9.1 |
| electronnpm | >=40.0.0-alpha.1,<40.10.6 | 40.10.6 |
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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Electron made the upstream request through defaultSession instead of the session that handled the protocol. A cached response could then be reused across otherwise isolated session partitions. Apps that use ProtocolResponse.url, omit ProtocolResponse.session, and rely on separate sessions to isolate content are affected. This issue is fixed in versions 40.10.6, 41.9.1, 42.5.1, and 43.0.0.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-70606 records a Medium severity (CVSS 5.9) vulnerability in Electron: ProtocolResponse.url reuses the default session cache instead of the registering session. 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 5.9. 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 | >= 40.0.0-alpha.1, < 40.10.6 || >= 41.0.0-alpha.1, < 41.9.1 || >= 42.0.0-alpha.1, < 42.5.1 || >= 43.0.0-alpha.1, < 43.0.0 | Not reported |
| electronnpm | >=43.0.0-alpha.1,<43.0.0 | 43.0.0 |
| electronnpm | >=42.0.0-alpha.1,<42.5.1 | 42.5.1 |
| electronnpm | >=41.0.0-alpha.1,<41.9.1 | 41.9.1 |
| electronnpm | >=40.0.0-alpha.1,<40.10.6 | 40.10.6 |
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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Electron made the upstream request through defaultSession instead of the session that handled the protocol. A cached response could then be reused across otherwise isolated session partitions. Apps that use ProtocolResponse.url, omit ProtocolResponse.session, and rely on separate sessions to isolate content are affected. This issue is fixed in versions 40.10.6, 41.9.1, 42.5.1, and 43.0.0.
Quoted source text, attributed separately from HOL analysis.