Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-96303Microsoft PowerShell Security Feature Bypass Vulnerability
Medium 6.5
In plain English
A medium-severity security flaw 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 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.7%top 47.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Improperly implemented security check for standard in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | powershell | 7.6.9-r0 | ALPINE-CVE-2026-96303 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | PowerShell 7.4 | 7.4.0 – before 7.4.21 |
| Microsoft | PowerShell 7.5 | 7.5.0 – before 7.5.12 |
| Microsoft | PowerShell 7.6 | 7.6.0 – before 7.6.8 |
Weakness: CWE-358 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
References
- Microsoft PowerShell Security Feature Bypass Vulnerability vendor-advisory, patch