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GHSA-m55f-7gqj-fr98

Electron: Extension tab APIs operate across session boundaries

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-70602

Packages

EcosystemPackageAffectedFixed in
npm electron < 39.8.8 39.8.8
npm electron >= 40.0.0-alpha.1, < 40.9.0 40.9.0
npm electron >= 41.0.0-alpha.1, < 41.2.1 41.2.1
npm electron >= 42.0.0-alpha.1, < 42.0.0-beta.3 42.0.0-beta.3

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact 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. Apps that do not load extensions, or that use a single session, are not affected. ### Workarounds Only load extensions from sources you trust; do not rely on session separation alone to contain an extension. ### Fixed Versions * `42.0.0-beta.3` * `41.2.1` * `40.9.0` * `39.8.8` ### For more information If you have any questions or comments about this advisory, email Electron at [[email protected]](mailto:[email protected])

References

External links from the advisory. They lead to third-party sites.