Should you update to Microsoft Edge 152.0.4191.135?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 152.0.4191.135 is a security update Microsoft released on 11 Aug 2026 for Mac and Windows. It fixes 27 security flaws, 5 rated critical and 22 important by Microsoft.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 151.0.4129.86, released 14 Aug 2026, which includes all of its fixes. If you’re on an older version, install that instead.
Should you update?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 156.0.4314.58 came out on 30 Oct 2026 and includes every fix in Microsoft Edge 152.0.4191.135, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 152.0.4191.135 still safe?
Not any more. The 25 updates since, up to Microsoft Edge 156.0.4314.58, fix 1,520 security flaws that Microsoft Edge 152.0.4191.135 doesn’t, and each became public the day its fix shipped. Installing it is safe: get it only from Edge’s own About page (Edge updates itself; there’s nothing to download from a website), never from a link in an email, text or pop-up.
What it fixes
Microsoft lists 27 security flaws, 5 rated critical and 22 important by Microsoft.[1] The 27 critical and important ones are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-106347 | Critical | Chromium CVE-2026-106347: Use after free |
CVE-2026-106358 | Critical | Chromium CVE-2026-106358: Use after free |
CVE-2026-110136 | Critical | Chromium CVE-2026-110136: Use after free |
CVE-2026-110148 | Critical | Chromium CVE-2026-110148: Use after free |
CVE-2026-110161 | Critical | Chromium CVE-2026-110161: Use after free |
CVE-2026-19175 | Important | CVE-2026-19175 Use after free in Payments |
CVE-2026-87474 | Important | Chromium CVE-2026-87474: Use after free in Payments |
CVE-2026-87581 | Important | Chromium CVE-2026-87581: Use after free in Payments |
CVE-2026-106184 | Important | Chromium CVE-2026-106184: Uninitialized resource |
CVE-2026-106200 | Important | Chromium CVE-2026-106200: Use after free |
CVE-2026-106235 | Important | Chromium CVE-2026-106235: Use after free |
CVE-2026-106383 | Important | Chromium CVE-2026-106383: Use after free |
CVE-2026-110139 | Important | Chromium CVE-2026-110139: Use after free |
CVE-2026-110140 | Important | Chromium CVE-2026-110140: Type confusion |
CVE-2026-110141 | Important | Chromium CVE-2026-110141: Observable discrepancy |
CVE-2026-110147 | Important | Chromium CVE-2026-110147: Use after free |
CVE-2026-110153 | Important | Chromium CVE-2026-110153: Use after free |
CVE-2026-110155 | Important | Chromium CVE-2026-110155: Buffer overflow |
CVE-2026-110156 | Important | Chromium CVE-2026-110156: Incorrect reference resolution |
CVE-2026-110157 | Important | Chromium CVE-2026-110157: Use after free |
CVE-2026-110160 | Important | Chromium CVE-2026-110160: Missing authorization |
CVE-2026-110162 | Important | Chromium CVE-2026-110162: Use after free |
CVE-2026-110163 | Important | Chromium CVE-2026-110163: Use after free |
CVE-2026-110164 | Important | Chromium CVE-2026-110164: Use after free |
CVE-2026-110167 | Important | Chromium CVE-2026-110167: Use after free |
CVE-2026-110170 | Important | Chromium CVE-2026-110170: Use after free |
CVE-2026-110171 | Important | Chromium CVE-2026-110171: Use after free |
How to update, and how long it takes
A minute or two. Edge restarts and reopens your tabs.
- Open Edge and click the three dots (…) at the top right.Choose Help and feedback, then About Microsoft Edge.
- Let it download the update.Edge checks as soon as that page opens. When it’s done, click Restart.
To check it worked: Three dots (…) → Help and feedback → About Microsoft Edge: the version is under the name, e.g. 157.0.4341.42. It should say 151.0.4129.86 or later.
151.0.4129.78 vs 152.0.4191.135
Microsoft Edge 151.0.4129.78, released 10 Aug 2026, fixed 39 security flaws. Microsoft Edge 152.0.4191.135 fixes 27 security flaws and includes the fixes before it, so going straight to 152.0.4191.135 gets you both.
- Before: Microsoft Edge 151.0.4129.78, 10 Aug 2026, 39 security flaws
- After: Microsoft Edge 151.0.4129.86, 14 Aug 2026, 6 security flaws
- Microsoft Edge updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Microsoft. “Microsoft Security Update Guide, Microsoft Edge (Chromium-based) 152.0.4191.135”, 11 Aug 2026.