CVE-2026-3277: Medium severity PowerShell Universal PowerShell Universal vulnerability
The OpenID Connect (OIDC) authentication configuration in PowerShell Universal before 2026.1.3 stores the OIDC client secret in cleartext in the .universal/authentication.ps1 script, which allows an attacker with read access to that file to obtain the OIDC client credentials
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-3277?
CVE-2026-3277 has a high severity level due to the exposure of the OIDC client secret in cleartext.
How do I fix CVE-2026-3277?
To fix CVE-2026-3277, upgrade PowerShell Universal to version 2026.1.3 or later to ensure the OIDC client secret is stored securely.
What data is compromised in CVE-2026-3277?
CVE-2026-3277 compromises the OIDC client secret, which can lead to unauthorized access if retrieved by an attacker.
Which versions of PowerShell Universal are affected by CVE-2026-3277?
CVE-2026-3277 affects all versions of PowerShell Universal prior to 2026.1.3.
Is read access to authentication.ps1 dangerous in CVE-2026-3277?
Yes, read access to the .universal/authentication.ps1 file is dangerous as it allows an attacker to obtain sensitive OIDC client credentials.