# Microsoft Edge WebView2 Runtime 149.0.4022.80 Microsoft Edge WebView2 Runtime 149.0.4022.80, released June 18, 2026, fixes 23 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. - Web page: https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-149.0.4022.80 - Platform: Windows apps - Released: Jun 18, 2026 - Priority: Urgent (Closes CVE-2026-12440, rated Critical) - CVEs: 23, exploited: 0, on CISA KEV: 0 - Superseded by: [Microsoft Edge WebView2 Runtime 157.0.4341.42](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md), the latest version, which also fixes every CVE listed here ## Applies to | Product | Release | Fixed in | |---|---|---| | [Microsoft Edge WebView2 Runtime](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md) | | 149.0.4022.80 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-12440](https://patchblox.com/security/data/cve/CVE-2026-12440.md) | Urgent | Chromium: CVE-2026-12440 Use after free in DigitalCredentials | 9.6 | 0.0025 | | | [CVE-2026-12443](https://patchblox.com/security/data/cve/CVE-2026-12443.md) | High | Chromium: CVE-2026-12443 Use after free in Web Authentication | 8.8 | 0.0061 | | | [CVE-2026-12447](https://patchblox.com/security/data/cve/CVE-2026-12447.md) | High | Chromium: CVE-2026-12447 Heap buffer overflow in WebRTC | 8.8 | 0.0043 | | | [CVE-2026-12466](https://patchblox.com/security/data/cve/CVE-2026-12466.md) | High | Chromium: CVE-2026-12466 Heap buffer overflow in WebRTC | 8.8 | 0.0043 | | | [CVE-2026-12439](https://patchblox.com/security/data/cve/CVE-2026-12439.md) | High | Chromium: CVE-2026-12439 Use after free in Digital Credentials | 8.8 | 0.0033 | | | [CVE-2026-12437](https://patchblox.com/security/data/cve/CVE-2026-12437.md) | High | Chromium: CVE-2026-12437 Use after free in WebShare | 8.3 | 0.0030 | | | [CVE-2026-12462](https://patchblox.com/security/data/cve/CVE-2026-12462.md) | High | Chromium: CVE-2026-12462 Use after free in Media | 7.5 | 0.0027 | | | [CVE-2026-12465](https://patchblox.com/security/data/cve/CVE-2026-12465.md) | High | Chromium: CVE-2026-12465 Insufficient validation of untrusted input in Metrics | 8.3 | 0.0024 | | | [CVE-2026-12455](https://patchblox.com/security/data/cve/CVE-2026-12455.md) | High | Chromium: CVE-2026-12455 Use after free in Tab Strip | 7.5 | 0.0023 | | | [CVE-2026-12464](https://patchblox.com/security/data/cve/CVE-2026-12464.md) | High | Chromium: CVE-2026-12464 Use after free in Browser | 8.3 | 0.0022 | | | [CVE-2026-12467](https://patchblox.com/security/data/cve/CVE-2026-12467.md) | High | Chromium: CVE-2026-12467 Use after free in Extensions | 8.3 | 0.0022 | | | [CVE-2026-12451](https://patchblox.com/security/data/cve/CVE-2026-12451.md) | High | Chromium: CVE-2026-12451 Use after free in DigitalCredentials | 8.3 | 0.0018 | | | [CVE-2026-12445](https://patchblox.com/security/data/cve/CVE-2026-12445.md) | High | Chromium: CVE-2026-12445 Use after free in Extensions | 7.5 | 0.0016 | | | [CVE-2026-12449](https://patchblox.com/security/data/cve/CVE-2026-12449.md) | High | Chromium: CVE-2026-12449 Use after free in Chromoting | 7.8 | 0.0011 | | | [CVE-2026-12461](https://patchblox.com/security/data/cve/CVE-2026-12461.md) | Routine | Chromium: CVE-2026-12461 Out of bounds read in WebRTC | 6.5 | 0.0024 | | | [CVE-2026-12446](https://patchblox.com/security/data/cve/CVE-2026-12446.md) | Routine | Chromium: CVE-2026-12446 Insufficient data validation in Passwords | 4.3 | 0.0019 | | | [CVE-2026-12458](https://patchblox.com/security/data/cve/CVE-2026-12458.md) | Routine | Chromium: CVE-2026-12458 Incorrect security UI in Passwords | 3.1 | 0.0019 | | | [CVE-2026-12459](https://patchblox.com/security/data/cve/CVE-2026-12459.md) | Routine | Chromium: CVE-2026-12459 Inappropriate implementation in Serial | 6.1 | 0.0018 | | | [CVE-2026-12453](https://patchblox.com/security/data/cve/CVE-2026-12453.md) | Routine | Chromium: CVE-2026-12453 Insufficient validation of untrusted input in Input | 4.2 | 0.0018 | | | [CVE-2026-12460](https://patchblox.com/security/data/cve/CVE-2026-12460.md) | Routine | Chromium: CVE-2026-12460 Insufficient policy enforcement in File System Access | 4.2 | 0.0015 | | | [CVE-2026-12444](https://patchblox.com/security/data/cve/CVE-2026-12444.md) | Routine | Chromium: CVE-2026-12444 Out of bounds read in Chromoting | 5.5 | 0.0014 | | | [CVE-2026-12456](https://patchblox.com/security/data/cve/CVE-2026-12456.md) | Routine | Chromium: CVE-2026-12456 Insufficient validation of untrusted input in Extensions | 4.2 | 0.0014 | | | [CVE-2026-12457](https://patchblox.com/security/data/cve/CVE-2026-12457.md) | Routine | Chromium: CVE-2026-12457 Insufficient data validation in Extensions | 4.2 | 0.0014 | | --- Data as of 2026-11-11T01:43:54Z UTC. 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