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CVE-2026-70603

Electron: shell.openPath path validation bypass via embedded null byte PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
electron / electronaffected < 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

CWE

CWE-20, CWE-158

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.