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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-158",
"CWE-20"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70603.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "39.8.6"
},
{
"introduced": "40.0.0-alpha.1"
},
{
"fixed": "40.9.0"
},
{
"introduced": "41.0.0-alpha.1"
},
{
"fixed": "41.1.1"
},
{
"introduced": "42.0.0-alpha.1"
},
{
"fixed": "42.0.0-beta.1"
}
],
"source": "AFFECTED_FIELD"
}