Improperly implemented security check for standard in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature over a network.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - Server-side request forgery (ssrf) in Microsoft PowerShell Core allows an unauthorized attacker to
    disclose information over a network. (CVE-2026-58612)

  - Improper neutralization of special elements used in a command ('command injection') in Microsoft
    PowerShell allows an authorized attacker to execute code locally. (CVE-2026-50523)

  - Incorrect default permissions in Microsoft PowerShell allows an authorized attacker to elevate privileges
    locally. (CVE-2026-59119)

  - Relative path traversal in Microsoft PowerShell Core allows an unauthorized attacker to execute code over
    a network. (CVE-2026-70337)

The version of Microsoft PowerShell installed on the remote host is 7.4.x prior to 7.4.21, 7.5.x prior to 7.5.12, or 7.6.x prior to 7.6.7. It is, therefore, affected by multiple vulnerabilities:

  - Reliance on untrusted inputs in a security decision in Microsoft PowerShell allows an unauthorized attacker to     execute code over a network. (CVE-2026-96251)

  - Improperly implemented security check for standard in Microsoft PowerShell allows an unauthorized attacker to     bypass a security feature over a network. (CVE-2026-96303)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
478239	Alpine: powershell: security update to 7.6.9-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
478239	Alpine: powershell: security update to 7.6.9-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
366463	Microsoft PowerShell 7.4.x < 7.4.21 / 7.5.x < 7.5.12 / 7.6.x < 7.6.7 Multiple Vulnerabilities (October 2026)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2026-96303

medium

Tenable Plugins

high

high

high