CVE-2026-118331: Chromium: CVE-2026-118331 Improper input validation in FileAPI
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
- Published by source
- 2026-10-13
- First seen by Reality Radar
- 2026-10-31
- Last verified
- 2026-10-31
Affected
- Manufacturer
- Microsoft
- Products
- Microsoft Edge (Chromium-based)
- CPE
- cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: Critical
Remedy / actions:
- Install the latest Microsoft security update
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- Microsoft Security Update Guide (MSRC) Tier A · official published 2026-10-13
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #3371 | new | 2026-10-31 | b3736e615bc2…325539 | 52699bb6b4c1…efbbb3 |
Chain head: #3380 4d4232c661b9…b678ae