TI-2026-21135 Aliases CVE-2026-26143 GHSA-hrfw-jjgv-mg38

Microsoft PowerShell Security Feature Bypass Vulnerability

LOW 37CWE-20Published 2026-04-14 · Updated 2026-10-15

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00536 45th percentileScored 2026-11-07

Fix Fixed PowerShell 7.4 (Microsoft): 7.4.14PowerShell 7.5 (Microsoft): 7.5.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	PowerShell 7.4	7.4.0 to before 7.4.14	7.4.14	Patch available	CNA
Microsoft	PowerShell 7.5	7.5.0 to before 7.5.5	7.5.5	Patch available	CNA

PowerShell 7.4 VendorMicrosoft Affected 7.4.0 to before 7.4.14 Fixed in 7.4.14 Patch available CNA
PowerShell 7.5 VendorMicrosoft Affected 7.5.0 to before 7.5.5 Fixed in 7.5.5 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:powershell::::::::	7.4 to before 7.4.14; 7.5 to before 7.5.5	Vulnerable	Microsoft

cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* Versions 7.4 to before 7.4.14; 7.5 to before 7.5.5 Vulnerable ·Microsoft

Remediation

Fix · CNA PowerShell 7.4 (Microsoft) Fixed in 7.4.14
Fix · CNA PowerShell 7.5 (Microsoft) Fixed in 7.5.5

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact: Security Feature Bypass
Exploited: No
Publicly disclosed: No
Exploitability: Exploitation Less Likely

Product	Status	Plan or fix
PowerShell 7.4	Fixed	7.4.14 · Security Update
PowerShell 7.5	Fixed	7.5.5 · Security Update

Timeline

2026-10-02 Threatist record created from CVE-2026-26143
2026-10-03 Alias added: GHSA-hrfw-jjgv-mg38

References

Patch 1

Microsoft PowerShell Security Feature Bypass Vulnerability

TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
TI-2022-19606 PowerShell Remote Code Execution Vulnerability CVSS 3.1HIGH 8.5
TI-2018-06024 A remote code execution vulnerability exists in PowerShell Editor Services, aka… CVSS 3.1CRITICAL 9.8
TI-2024-00056 NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.8
TI-2022-07392 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
TI-2024-17279 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5

See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences