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Privacy Statement Third-Party Cookies Accept Reject Manage cookies MSRC  Customer Guidance  Security Update Guide  Vulnerabilities  CVE-2026-41103 Microsoft SSO Plugin for Jira & Confluence Elevation of Privilege Vulnerability New On this page  CVE-2026-41103  Subscribe RSS PowerShell  API  CSAF Security Vulnerability Released: May 12, 2026 Assigning CNA Microsoft CVE.org link CVE-2026-41103  Impact Elevation of Privilege Max Severity Critical Weakness CWE-303: Incorrect Implementation of Authentication Algorithm CVSS Source Microsoft Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C Metrics CVSS:3.1 9.1 / 7.9  Base score metrics: 9.1 / Temporal score metrics: 7.9  Expand all  Collapse all Metric Value   Base score metrics(8) Attack Vector Network Attack Complexity Low Privileges Required None User Interaction None Scope Unchanged Confidentiality High Integrity High Availability None   Temporal score metrics(3) Exploit Code Maturity Unproven Remediation Level Official Fix Report Confidence Confirmed Please see Common Vulnerability Scoring System for more information on the definition of these metrics. Executive Summary Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network. Exploitability The following table provides an exploitability assessment for this vulnerability at the time of original publication. Publicly disclosed No Exploited No Exploitability assessment Exploitation More Likely FAQ What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could bypass authentication and gain unauthorized access to Jira or Confluence as a valid user. This may allow the attacker to view or modify content and perform actions with the same permissions as the compromised account, based on the authorization levels defined for that user within the Jira or Confluence server. How could an attacker exploit the vulnerability? An attacker could exploit this vulnerability by sending a specially crafted SSO response during the login process that tricks the system into accepting a forged identity, allowing the attacker to sign in without authenticating the user through Microsoft Entra ID. According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H), and integrity (I:H), but could lead to no loss of availability (A:N). What does that mean for this vulnerability? This means that an attacker who successfully exploits the vulnerability could access sensitive information and modify data within Jira or Confluence based on the authorization defined for the user in those servers but availability is not impacted because the vulnerability only allows an attacker to bypass authentication and act as a legitimate user, without providing any capability to disrupt, degrade, or take down the Jira or Confluence service itself. Acknowledgements Robert Fitzpatrick with Microsoft Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information. Security Updates To determine the support lifecycle for your software, see the Microsoft Support Lifecycle. Release date Descending  Edit columns  Download  Filters  Product Family  Max Severity  Impact  Platform   Clear Release date  Product Platform Impact Max Severity Article Download Build Number Assigning CNA Customer Action Required Title: Release date, Content: May 12, 2026 Microsoft Confluence SAML SSO plugin - Elevation of Privilege Critical Title: Knowledge Base Articles for Microsoft Confluence SAML SSO plugin, Content:, 1 link Release Notes  Title: Download Security Update for Microsoft Confluence SAML SSO plugin, Content:, 1 link Security Update  Title: Build numbers, Content: 7.4.0 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required Title: Release date, Content: May 12, 2026 Microsoft JIRA SAML SSO plugin - Elevation of Privilege Critical Title: Knowledge Base Articles for Microsoft JIRA SAML SSO plugin, Content:, 2 links Release Notes  Release Notes  Title: Download Security Update for Microsoft JIRA SAML SSO plugin, Content:, 2 links Security Update  Security Update (Atlassian Marketplace)  Title: Build numbers, Content: 1.3.3 1.3.3 Title: Assigning CNA, Content: Microsoft Title: Customer action required, Content: Required All results loaded Loaded all 2 rows Disclaimer The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Revisions version revisionDate description 1.0 May 12, 2026 Information published.  How satisfied are you with the MSRC Security Update Guide? Rating  Broken  Bad  Below average  Average  Great!  Your Privacy Choices Consumer Health Privacy