Critical severity · published Sep 6, 2023
CVE-2023-23623
Content-Secrity-Policy disabling eval not applied consistently in renderers with sandbox disabled in Electron
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
Electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS. A Content-Security-Policy that disables eval, specifically setting a `script-src` directive and _not_ providing `unsafe-eval` in that directive, is not respected in renderers that have sandbox disabled. i.e. `sandbox: false` in the `webPreferences` object. This allows usage of methods like `eval()` and `new Function` unexpectedly which can result in an expanded attack surface. This issue only ever affected the 22 and 23 major versions of Electron and has been fixed in the latest versions of those release lines. Specifically, these versions contain the fixes: 22.0.1 and 23.0.0-alpha.2 We recommend all apps upgrade to the latest stable version of Electron. If upgrading isn't possible, this issue can be addressed without upgrading by enabling `sandbox: true` on all renderers.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
electron · electron
>= 22.0.0-beta.1, < 22.0.1; >= 23.0.0-alpha.1, < 23.0.0-alpha.2 · source: vendor, NVD, CISA
Affected product
EL
electron
electron
More from electron
9.8
CVE-2026-102676
Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions
9.8
CVE-2026-34775
Electron: nodeIntegrationInWorker not correctly scoped in shared renderer processes
9.3
CVE-2026-54257
Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow
8.8
CVE-2026-102677
Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
8.8
CVE-2026-34765
Electron named window.open targets not scoped to the opener's browsing context