CVE-2026-56857: Root.Mkdir(All) can follow junctions out of the root on Windows in os
Root.Mkdir(All) can follow junctions out of the root on Windows in os
- Published by source
- 2026-10-13
- First seen by Reality Radar
- 2026-10-22
- Last verified
- 2026-10-22
Affected
- Manufacturer
- Microsoft
- Products
- azl3 golang 1.26.7-1 on Azure Linux 3.0 azl3 golang 1.27.1-1 on Azure Linux 3.0
- CPE
- cpe:2.3:a:microsoft:azl3_golang_1.26.7-1:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azl3_golang_1.27.1-1:*:*:*:*:*:*:*:*
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 |
|---|---|---|---|---|
| #297 | new | 2026-10-22 | 235a6a58396a…dcdd50 | cc541e3a5e46…0cbba8 |
Chain head: #1076 8ad5adc30b9b…88ce20