CVE-2026-70608Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path
- 7.2HighCVSS base score
- 0.43%Exploitation in 30 daysEPSS · top 62% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.
Timeline
ID reserved
By GitHub_M
- 1 day later
· 1 day later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Analyzed | 3.1 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.43% · top 62% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmelectronGHSA-9f4c-93c8-jc8g (opens in a new tab)
References
References10
- https://github.com/electron/electron/security/advisories/GHSA-9f4c-93c8-jc8g (opens in a new tab)x_refsource_CONFIRM
- https://github.com/electron/electron/pull/51437 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/pull/51438 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/pull/51439 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd7851291d3159de57 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb588adc9a11de0d3 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82c701a56cf159f (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/releases/tag/v39.8.10 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/releases/tag/v41.10.3 (opens in a new tab)x_refsource_MISC
- https://github.com/electron/electron/releases/tag/v42.0.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-53564 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-9f4c-93c8-jc8g (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-70608)Record last updated .