Should you update to Microsoft Edge 155.0.4283.48?
No: install Microsoft Edge 156.0.4314.58 instead. Microsoft Edge 155.0.4283.48 is a security update Microsoft released on 12 Oct 2026 for Mac and Windows. It fixes 34 security flaws.[1] None of them is known to be used in attacks.
It has since been replaced by Microsoft Edge 155.0.4283.60, released 15 Oct 2026, which includes all of its fixes.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 155.0.4283.48, so there’s no reason to stop at this one. Software Update offers the newest version your device can run.
Is Microsoft Edge 155.0.4283.48 still safe?
Not any more. The 7 updates since, up to Microsoft Edge 156.0.4314.58, fix 459 security flaws that Microsoft Edge 155.0.4283.48 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 34 security flaws.[1] Microsoft doesn’t rate them by severity. They are:
| Flaw | Severity | What Microsoft calls it |
|---|---|---|
CVE-2026-102327 | Not rated | Chromium CVE-2026-102327: Incorrect authorization in WebView |
CVE-2026-106192 | Not rated | Chromium CVE-2026-106192: Information leak in Mobile |
CVE-2026-106206 | Not rated | Chromium CVE-2026-106206: Improper input validation in Mobile |
CVE-2026-106209 | Not rated | Chromium CVE-2026-106209: UI misrepresentation in Mobile |
CVE-2026-106221 | Not rated | Chromium CVE-2026-106221: Confused deputy in WebAPKs |
CVE-2026-106223 | Not rated | Chromium CVE-2026-106223: Uninitialized resource in GPU |
CVE-2026-106254 | Not rated | Chromium CVE-2026-106254: Information leak in Mobile |
CVE-2026-106282 | Not rated | Chromium CVE-2026-106282: UI misrepresentation in WebOTP |
CVE-2026-106290 | Not rated | Chromium CVE-2026-106290: Uninitialized resource in GPU |
CVE-2026-106296 | Not rated | Chromium CVE-2026-106296: Improper privilege management in UI |
CVE-2026-106298 | Not rated | Chromium CVE-2026-106298: Use after free in Chrome Tabs |
CVE-2026-106305 | Not rated | Chromium CVE-2026-106305: UI misrepresentation in Mobile |
CVE-2026-106313 | Not rated | Chromium CVE-2026-106313: Incorrect authorization in Browser |
CVE-2026-106317 | Not rated | Chromium CVE-2026-106317: UI misrepresentation in FullScreen |
CVE-2026-106320 | Not rated | Chromium CVE-2026-106320: Use of released resource in UI |
CVE-2026-106326 | Not rated | Chromium CVE-2026-106326: Confused deputy in UI |
CVE-2026-106337 | Not rated | Chromium CVE-2026-106337: UI misrepresentation in UI |
CVE-2026-106353 | Not rated | Chromium CVE-2026-106353: Improper input validation in Mobile |
CVE-2026-106361 | Not rated | Chromium CVE-2026-106361: Incorrect provision of specified functionality in Mobile |
CVE-2026-106366 | Not rated | Chromium CVE-2026-106366: Incomplete cleanup in CustomTabs |
CVE-2026-106367 | Not rated | Chromium CVE-2026-106367: Missing authorization in Mobile |
CVE-2026-106368 | Not rated | Chromium CVE-2026-106368: UI misrepresentation in UI |
CVE-2026-106372 | Not rated | Chromium CVE-2026-106372: Incorrect authorization in UI |
CVE-2026-106380 | Not rated | Chromium CVE-2026-106380: UI misrepresentation in UI |
CVE-2026-106387 | Not rated | Chromium CVE-2026-106387: Missing authorization in Mobile |
CVE-2026-106395 | Not rated | Chromium CVE-2026-106395: Uninitialized resource in Dawn |
CVE-2026-106397 | Not rated | Chromium CVE-2026-106397: Incorrect authorization in Mobile |
CVE-2026-106400 | Not rated | Chromium CVE-2026-106400: Clickjacking in Messages |
CVE-2026-106405 | Not rated | Chromium CVE-2026-106405: Race condition in CustomTabs |
CVE-2026-106406 | Not rated | Chromium CVE-2026-106406: Missing authorization in Mobile |
| and 4 more | ||
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 155.0.4283.60 or later.
155.0.4283.45 vs 155.0.4283.48
Microsoft Edge 155.0.4283.45, released 8 Oct 2026, fixed 212 security flaws. Microsoft Edge 155.0.4283.48 fixes 34 security flaws and includes the fixes before it, so going straight to 155.0.4283.48 gets you both.
- Before: Microsoft Edge 155.0.4283.45, 8 Oct 2026, 212 security flaws
- After: Microsoft Edge 155.0.4283.60, 15 Oct 2026, 19 security flaws
- Microsoft Edge updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Microsoft. “Microsoft Edge security release notes, October 12, 2026”, 12 Oct 2026.