Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-70603— Electron: shell.openPath path validation bypass via embedded null byte

Quick assessment

Affected
electron electron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Electron是Electron组织开源的一个跨平台的桌面应用开发框架。 Electron 39.8.6之前版本、40.9.0之前版本、41.1.1之前版本和42.0.0-beta.1之前版本存在输入验证错误漏洞，该漏洞源于shell.openPath()函数未拒绝包含嵌入空字节的路径，可能导致仅进行字符串验证的应用程序被绕过，从而使攻击者控制的路径能够打开与验证不同的文件。

CVSS 6.0 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 4

VendorProduct Version RangeStatus
electron electron < 39.8.6 affected
>= 40.0.0-alpha.1, < 40.9.0 affected
>= 41.0.0-alpha.1, < 41.1.1 affected
>= 42.0.0-alpha.1, < 42.0.0-beta.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-70603

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Electron: shell.openPath path validation bypass via embedded null byte
Source: CVE Program / CVE List V5
Vulnerability Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1, shell.openPath() did not reject paths containing embedded null bytes. Apps that perform string-only validation of file paths, for example checking the file extension, before passing them to shell.openPath() could be bypassed, allowing an attacker-controlled path to open a different file than the one that passed validation. Apps are only affected if they pass paths derived from untrusted input to shell.openPath() and rely on string-based validation without a filesystem check. This issue is fixed in versions 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Electron是Electron组织开源的一个跨平台的桌面应用开发框架。 Electron 39.8.6之前版本、40.9.0之前版本、41.1.1之前版本和42.0.0-beta.1之前版本存在输入验证错误漏洞，该漏洞源于shell.openPath()函数未拒绝包含嵌入空字节的路径，可能导致仅进行字符串验证的应用程序被绕过，从而使攻击者控制的路径能够打开与验证不同的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 39.8.6 -

II. Public POCs for CVE-2026-70603

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-70603

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-70603 (1)

Same Patch Batch · electron · 2026-08-05 · 16 CVEs total

CVE-2026-70601 7.5 HIGH Electron: Context isolation bypass via Function.prototype.bind hijack
CVE-2026-70604 7.4 HIGH Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin rea
CVE-2026-70608 7.2 HIGH Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigat
CVE-2026-70611 6.9 MEDIUM Electron: DevTools embedder handler executes arbitrary files via shell open
CVE-2026-70602 6.6 MEDIUM Electron: Extension tab APIs operate across session boundaries
CVE-2026-70597 6.3 MEDIUM Electron: Parent process code-sign check is spoofable
CVE-2026-70605 5.9 MEDIUM Electron: HTTP redirect followed into local file loader
CVE-2026-70606 5.9 MEDIUM Electron: ProtocolResponse.url reuses the default session cache instead of the registering
CVE-2026-70599 5.9 MEDIUM Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe
CVE-2026-70609 5.7 MEDIUM Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter
CVE-2026-70610 5.4 MEDIUM Electron: contextBridge object copy honors prototype setters
CVE-2026-70612 5.4 MEDIUM Electron: Sandboxed iframes can launch external protocol handlers
CVE-2026-70607 5.3 MEDIUM Electron: window.open features string controls some window options considered privileged
CVE-2026-70598 3.9 LOW Electron: Off-screen rendering trusts GPU-supplied geometry over shared-memory size
CVE-2026-70600 3.1 LOW Electron: Cross-origin iframe can position native autofill popup

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-20

V. Comments for CVE-2026-70603

No comments yet

Leave a comment