CVE-2026-26143
Microsoft PowerShell Security Feature Bypass Vulnerability
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft PowerShell Security Feature Bypass Vulnerability
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
CVE-2026-26143- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2026-22369
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
EUVD-2026-22369- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hrfw-jjgv-mg38
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a...
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
GHSA-hrfw-jjgv-mg38- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
CVE-2026-26143- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
CVE-2026-26143- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVBIT-powershell-2026-26143 No score
Microsoft PowerShell Security Feature Bypass Vulnerability
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Record
BIT-powershell-2026-26143- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
powershellBitnami |
7.4.0 up to 7.4.14, 7.5.0 up to 7.5.5 | 7.4.147.5.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-26143 is a high vulnerability (CVSS 7.8) in Microsoft Powershell, published April 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. Fixed in powershell 7.4.14.