Is there a public exploit for CVE-2026-70603?

No public exploit for CVE-2026-70603 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-70603?

CVE-2026-70603 scores CVSS 6 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.13%.

What does CVE-2026-70603 affect?

CVE-2026-70603 affects electron electron.

6.0 Medium

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS.

CVE-2026-70603

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.

Assessment

CVSS: 6 (v3.1)
Severity: Medium
EPSS: 0.13% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 August 2026
Last updated: 3 November 2026
Affected: electron · electron
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

At the source

EUVD (ENISA)

References

https://github.com/electron/electron/security/advisories/GHSA-5c9j-mhmv-5xgx

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