Vulnerability · Published Apr 14, 2026 · Assigned by microsoft
CVE-2026-26143Microsoft PowerShell Security Feature Bypass Vulnerability
High 7.8
In plain English
A high-severity improper input validation in PowerShell 7.4 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.5%top 54.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | PowerShell 7.4 | 7.4.0 – before 7.4.14 |
| Microsoft | PowerShell 7.5 | 7.5.0 – before 7.5.5 |
Weakness: CWE-20 · Vector: 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
References
- Microsoft PowerShell Security Feature Bypass Vulnerability vendor-advisory, patch