Microsoft Edge Dev 155.0.4273.0
Microsoft Edge Dev 155.0.4273.0, released September 11, 2026, fixes 128 CVEs in Microsoft Edge Dev. One of them is being exploited (CVE-2026-96951); 1 on CISA KEV. Patch Radar priority: Patch now. The latest Microsoft Edge Dev is 159.0.4378.0, which also fixes every one of these CVEs.
Superseded. The latest Microsoft Edge Dev is 159.0.4378.0, which also fixes every CVE on this page. Install that instead.
Priority of the 128 CVEs
Applies to
| Product | Version |
|---|---|
| Microsoft Edge Dev | 155.0.4273.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Patch now | CVE-2026-96951 | Windows Shell Security Feature Bypass Vulnerability | 8.8 | 0.0981 | KEVExploited |
| Urgent | CVE-2026-96202 | Windows Raw Image Extension Remote Code Execution Vulnerability | 8.8 | 0.0093 | Exploitation Less Likely |
| Urgent | CVE-2026-95339 | Chromium CVE-2026-95339: Use after free in ServiceWorker | 9.6 | 0.0047 | None reported |
| Urgent | CVE-2026-95310 | Chromium CVE-2026-95310: Use after free in AdFilter | 9.6 | 0.0045 | None reported |
| Urgent | CVE-2026-95313 | Chromium CVE-2026-95313: Use after free in Fullscreen | 9.6 | 0.0045 | None reported |
| Urgent | CVE-2026-95356 | Chromium CVE-2026-95356: Use after free in WindowDialog | 9.6 | 0.0042 | None reported |
| Urgent | CVE-2026-103628 | Chromium CVE-2026-103628: Out of bounds write | 9.6 | 0.0038 | None reported |
| Urgent | CVE-2026-103626 | Chromium CVE-2026-103626: Incorrect authorization | 9.6 | 0.0033 | None reported |
| Urgent | CVE-2026-103630 | Chromium CVE-2026-103630: Use after free | 9.6 | 0.0033 | None reported |
| High | CVE-2026-83831 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0075 | Exploitation Less Likely |
| High | CVE-2026-85898 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0075 | Exploitation Less Likely |
| High | CVE-2026-88077 | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability | 8.8 | 0.0063 | Exploitation Less Likely |
| High | CVE-2026-85890 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2026-85897 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2026-96198 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2026-96199 | Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability | 8.8 | 0.0057 | Exploitation Less Likely |
| High | CVE-2026-103631 | Chromium CVE-2026-103631: Buffer overflow | 8.8 | 0.0046 | None reported |
| High | CVE-2026-102299 | Chromium CVE-2026-102299: Type confusion | 8.8 | 0.0042 | None reported |
| High | CVE-2026-102323 | Chromium CVE-2026-102323: Type confusion | 8.8 | 0.0042 | None reported |
| High | CVE-2026-95276 | Chromium CVE-2026-95276: Improper input validation in Themes | 8.3 | 0.0040 | None reported |
| High | CVE-2026-95318 | Chromium CVE-2026-95318: Buffer overflow in Video | 9.6 | 0.0039 | None reported |
| High | CVE-2026-102306 | Chromium CVE-2026-102306: Use after free | 9.6 | 0.0038 | None reported |
| High | CVE-2026-95343 | Chromium CVE-2026-95343: Use after free in WebAudio | 8.8 | 0.0037 | None reported |
| High | CVE-2026-102302 | Chromium CVE-2026-102302: Buffer overflow | 8.8 | 0.0036 | None reported |
| High | CVE-2026-95282 | Chromium CVE-2026-95282: Use after free in Platform | 8.8 | 0.0035 | None reported |
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