Incorrect Implementation of Authentication Algorithm in Microsoft JIRA SAML SSO plugin and Microsoft Confluence SAML SSO plugin - CVE-2026-41103
Published: May 13, 2026
Vulnerability identifier: #VU131306
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-41103
CWE-ID: CWE-303
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft JIRA SAML SSO plugin
Microsoft Confluence SAML SSO plugin
Microsoft JIRA SAML SSO plugin
Microsoft Confluence SAML SSO plugin
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence. A remote attacker can gain elevated privileges on the target system.
How to mitigate CVE-2026-41103
Install updates from vendor's website.