CVE-2026-70603Electron: shell.openPath path validation bypass via embedded null byte
Updated under an hour ago ()
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It affects electron and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 6.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-20, CWE-158
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | before 39.8.6; from 40.0.0-alpha.1, < 40.9.0; from 41.0.0-alpha.1, < 41.1.1; from 42.0.0-alpha.1, < 42.0.0-beta.1 | CNA record |
electronjs electron electronjs:electron | before 39.8.6; from 40.0.0 before 40.9.0; from 41.0.0 before 41.1.1; 42.0.0; 42.0.0; 42.0.0; 42.0.0; 42.0.0; and 2 more ranges | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-5c9j-mhmv-5xgxx-refsource-confirm, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.