Windows apps · Application version · December 4, 2025

Microsoft Edge WebView2 Runtime 143.0.3650.66

Microsoft Edge WebView2 Runtime 143.0.3650.66, released December 4, 2025, fixes 14 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: High. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.

High

Superseded. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every CVE on this page. Install that instead.

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

8.8

Base score, 0 to 10

Highest EPSS

0.0050

43rd percentile

Priority of the 14 CVEs

Patch now 0
                                Urgent 0
                                High 7
                                Routine 7

Applies to

Product	Version
Microsoft Edge WebView2 Runtime	143.0.3650.66

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2025-13633	Chromium: CVE-2025-13633 Use after free in Digital Credentials	8.8	0.0050	None reported
High	CVE-2025-13630	Chromium: CVE-2025-13630 Type Confusion in V8	8.8	0.0046	None reported
High	CVE-2025-13631	Chromium: CVE-2025-13631 Inappropriate implementation in Google Updater	8.8	0.0042	None reported
High	CVE-2025-13720	Chromium: CVE-2025-13720 Bad cast in Loader	8.8	0.0033	None reported
High	CVE-2025-13638	Chromium: CVE-2025-13638 Use after free in Media Stream	8.8	0.0032	None reported
High	CVE-2025-13639	Chromium: CVE-2025-13639 Inappropriate implementation in WebRTC	8.1	0.0031	None reported
High	CVE-2025-13721	Chromium: CVE-2025-13721 Race in v8	7.5	0.0026	None reported
Routine	CVE-2025-62223	Microsoft Edge (Chromium-based) for Mac Spoofing Vulnerability	4.3	0.0047	Exploitation Unlikely
Routine	CVE-2025-13637	Chromium: CVE-2025-13637 Inappropriate implementation in Downloads	4.3	0.0025	None reported
Routine	CVE-2025-13632	Chromium: CVE-2025-13632 Inappropriate implementation in DevTools	5.4	0.0024	None reported
Routine	CVE-2025-13636	Chromium: CVE-2025-13636 Inappropriate implementation in Split View	4.3	0.0024	None reported
Routine	CVE-2025-13635	Chromium: CVE-2025-13635 Inappropriate implementation in Downloads	4.4	0.0018	None reported
Routine	CVE-2025-13640	Chromium: CVE-2025-13640 Inappropriate implementation in Passwords	3.5	0.0018	None reported
Routine	CVE-2025-13634	Chromium: CVE-2025-13634 Inappropriate implementation in Downloads	4.4	0.0017	None reported

Other Microsoft Edge WebView2 Runtime versions with security fixes

Microsoft Edge WebView2 Runtime 156.0.4314.58
Microsoft Edge WebView2 Runtime
Microsoft Edge WebView2 Runtime 156.0.4314.56
Microsoft Edge WebView2 Runtime
Microsoft Edge WebView2 Runtime 156.0.4314.50
Microsoft Edge WebView2 Runtime
Microsoft Edge WebView2 Runtime 156.0.4314.42
Microsoft Edge WebView2 Runtime
Microsoft Edge WebView2 Runtime 155.0.4283.62
Microsoft Edge WebView2 Runtime
Microsoft Edge WebView2 Runtime 155.0.4283.60
Microsoft Edge WebView2 Runtime

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