CVE-2026-3939: Low Insufficient policy enforcement in PDF.
Chromium: CVE-2026-3939 Use after free in WebView
Other sources
Insufficient policy enforcement in PDF in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to bypass navigation restrictions via a crafted PDF file. (Chromium security severity: Low)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Credit
Affected Software
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2026-3939?
The severity of CVE-2026-3939 is categorized as Low according to Chromium security metrics.
How do I fix CVE-2026-3939?
To fix CVE-2026-3939, update Google Chrome to version 146.0.7680.71 or later.
What vulnerability does CVE-2026-3939 address?
CVE-2026-3939 addresses the insufficient policy enforcement in the PDF handling feature of Google Chrome.
What are the affected versions for CVE-2026-3939?
CVE-2026-3939 affects Google Chrome versions prior to 146.0.7680.71 and Microsoft Edge versions prior to 146.0.3856.59.
Can CVE-2026-3939 be exploited remotely?
Yes, CVE-2026-3939 can be exploited remotely by attackers through a specially crafted PDF file.