Windows apps · Application version · September 4, 2026

Microsoft Edge WebView2 Runtime 152.0.4191.66

Microsoft Edge WebView2 Runtime 152.0.4191.66, released September 4, 2026, fixes 9 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: Urgent. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.

Urgent

Superseded.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
9
2 rated Critical
Exploited
0
None reported
Highest CVSS
9.6
Base score, 0 to 10
Highest EPSS
0.0046
40th percentile

Priority of the 9 CVEs

Patch now 0 Urgent 2 High 6 Routine 1

Applies to

ProductVersion
Microsoft Edge WebView2 Runtime152.0.4191.66

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
Urgent CVE-2026-85042 Chromium CVE-2026-85042: Use after free in DevTools9.6 0.0046 None reported
Urgent CVE-2026-85043 Chromium CVE-2026-85043: Incomplete cleanup in Network9.1 0.0044 None reported
High CVE-2026-85051 Chromium CVE-2026-85051: Type confusion in Compositing8.8 0.0045 None reported
High CVE-2026-85053 Chromium CVE-2026-85053: Improper resource exposure in CacheStorage8.8 0.0041 None reported
High CVE-2026-85048 Chromium CVE-2026-85048: Use after free in Compositing8.3 0.0040 None reported
High CVE-2026-85049 Chromium CVE-2026-85049: Use after free in Skia9.6 0.0028 None reported
High CVE-2026-85045 Chromium CVE-2026-85045: Race condition in V87.5 0.0022 None reported
High CVE-2026-85892 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability7.8 0.0020 Exploitation Less Likely
Routine CVE-2026-85052 Chromium CVE-2026-85052: Out of bounds read in CrashReporting3.1 0.0023 None reported
Showing 1 to 9 of 9 1

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