Microsoft Edge WebView2 Runtime 155.0.4283.45
Microsoft Edge WebView2 Runtime 155.0.4283.45, released October 8, 2026, fixes 182 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.
Superseded. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every CVE on this page. Install that instead.
Priority of the 182 CVEs
Applies to
| Product | Version |
|---|---|
| Microsoft Edge WebView2 Runtime | 155.0.4283.45 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-106358 | Chromium CVE-2026-106358: Use after free | 9.6 | 0.0057 | None reported |
| Urgent | CVE-2026-106197 | Chromium CVE-2026-106197: Use after free | 9.6 | 0.0057 | None reported |
| Urgent | CVE-2026-106382 | Chromium CVE-2026-106382: Use after free | 9.6 | 0.0040 | None reported |
| Urgent | CVE-2026-106347 | Chromium CVE-2026-106347: Use after free | 8.8 | 0.0036 | None reported |
| High | CVE-2026-85899 | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability | 8.1 | 0.0064 | Exploitation Unlikely |
| High | CVE-2026-96192 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0057 | N/A |
| High | CVE-2026-96203 | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability | 8.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2026-106240 | Chromium CVE-2026-106240: Type confusion | 8.8 | 0.0055 | None reported |
| High | CVE-2026-106357 | Chromium CVE-2026-106357: Use after free | 8.8 | 0.0052 | None reported |
| High | CVE-2026-96187 | Microsoft Edge (Chromium-based) Information Disclosure Vulnerability | 7.4 | 0.0050 | N/A |
| High | CVE-2026-106211 | Chromium CVE-2026-106211: Use after free | 9.6 | 0.0046 | None reported |
| High | CVE-2026-106227 | Chromium CVE-2026-106227: Use after free | 9.6 | 0.0044 | None reported |
| High | CVE-2026-102322 | Chromium CVE-2026-102322: Incorrect Authorization | 9.6 | 0.0042 | None reported |
| High | CVE-2026-106375 | Chromium CVE-2026-106375: Incomplete cleanup | 9.6 | 0.0041 | None reported |
| High | CVE-2026-106193 | Chromium CVE-2026-106193: Use after free | 8.8 | 0.0040 | None reported |
| High | CVE-2026-106194 | Chromium CVE-2026-106194: Missing authorization | 8.3 | 0.0040 | None reported |
| High | CVE-2026-106268 | Chromium CVE-2026-106268: Use after free | 8.8 | 0.0039 | None reported |
| High | CVE-2026-106200 | Chromium CVE-2026-106200: Use after free | 8.8 | 0.0039 | None reported |
| High | CVE-2026-106233 | Chromium CVE-2026-106233: Use after free | 8.3 | 0.0039 | None reported |
| High | CVE-2026-106235 | Chromium CVE-2026-106235: Use after free | 8.8 | 0.0038 | None reported |
| High | CVE-2026-106228 | Chromium CVE-2026-106228: Confused deputy | 8.3 | 0.0038 | None reported |
| High | CVE-2026-106190 | Chromium CVE-2026-106190: Use after free | 8.8 | 0.0037 | None reported |
| High | CVE-2026-106191 | Chromium CVE-2026-106191: Missing authorization | 8.3 | 0.0037 | None reported |
| High | CVE-2026-106374 | Chromium CVE-2026-106374: Type confusion | 8.8 | 0.0036 | None reported |
| High | CVE-2026-106204 | Chromium CVE-2026-106204: Use after free | 8.8 | 0.0036 | None reported |
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