Authentication Bypass in Microsoft SSO Plugin for Jira & Confluence
CVE-2026-41103 is a critical elevation of privilege vulnerability in the Microsoft SSO Plugin for Jira & Confluence, specifically affecting the Microsoft Confluence SAML SSO plugin and the Microsoft JIRA SAML SSO plugin. The flaw is caused by an incorrect implementation of the authentication algorithm. Available reporting indicates exploitation is possible during the login flow by sending a specially crafted SSO/SAML response that causes the plugin to accept a forged identity without properly authenticating the user through Microsoft Entra ID. As a result, the attacker can bypass authentication and sign in as a valid user.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Recent activity
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An elevation of privilege vulnerability in the Microsoft SSO Plugin for Jira & Confluence caused by incorrect implementation of the authentication algorithm, with exploitation rated more likely.
An authentication flaw in Microsoft SSO Plugin for Jira & Confluence that allows attackers to forge credentials, bypass Entra ID, and impersonate existing users.
A critical authentication bypass/forged identity vulnerability in the Microsoft SSO Plugin for Jira & Confluence that can allow unauthorized login and access or modification of data without Entra ID authentication.
A critical elevation of privilege vulnerability in Microsoft SSO plugins for Jira and Confluence caused by incorrect implementation of an authentication algorithm, allowing authentication bypass and sign-in as a valid user.
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Cross-references every affected SKU, including bundled OEM variants.
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