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CVE-2026-26143

HighCVSS 7.8/10Last modified Oct 26, 2026

Description

Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	PowerShell 7.4	>= 7.4.0, < 7.4.14
Microsoft	PowerShell 7.5	>= 7.5.0, < 7.5.5

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143Vendor Advisory

Timeline

Published: Apr 14, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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CVE-2026-26143: High severity, CVSS 7.8 | Vulnix