{"cve":"CVE-2026-70610","nvd":{"published":"2026-08-05T18:17:15.463","modified":"2026-10-08T13:53:12.030","status":"Analyzed","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-1321"],"references":["https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713","https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4dd","https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55","https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737","https://github.com/electron/electron/pull/51083"],"products":["electronjs:electron"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70610","score":0.00564,"percentile":0.4657,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-ff2p-hmqr-hxm4","url":"https://osv.dev/vulnerability/GHSA-ff2p-hmqr-hxm4","summary":"Electron: contextBridge object copy honors prototype setters","modified":"2026-08-05T17:56:07.830265Z","packages":[{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":["<39.8.9"],"fixed":["39.8.9"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=40.0.0-alpha.1 <40.9.2"],"fixed":["40.9.2"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=41.0.0-alpha.1 <41.2.2"],"fixed":["41.2.2"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=42.0.0-alpha.1 <42.0.0-beta.4"],"fixed":["42.0.0-beta.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}