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CVE-2026-56857: Insecure Operation on Windows Junction / Mount Point

🗓️ 08 Oct 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 3 Views

Root.Mkdir or Root.MkdirAll on Windows junctions can create directories outside the root.

Related
Refs
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux
CVE-2026-56857
8 Oct 202622:53
–alpinelinux
cgr
Chainguard
CVE-2026-56857 vulnerabilities
10 Oct 202608:54
–cgr
circl
Circl
CVE-2026-56857
9 Oct 202612:01
–circl
cve
CVE
CVE-2026-56857
8 Oct 202622:53
–cve
cvelist
Cvelist
CVE-2026-56857 Root.Mkdir(All) can follow junctions out of the root on Windows in os
8 Oct 202622:53
–cvelist
debiancve
Debian CVE
CVE-2026-56857
8 Oct 202622:53
–debiancve
euvd
EUVD
EUVD-2026-95420
9 Oct 202600:31
–euvd
mend
Mend
CVE-2026-56857
8 Oct 202622:53
–mend
mscve
Microsoft CVE
Root.Mkdir(All) can follow junctions out of the root on Windows in os
11 Oct 202608:54
–mscve
nvd
NVD
CVE-2026-56857
8 Oct 202623:17
–nvd
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09 Oct 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.19.8
EPSS0.00493
SSVC
3