Main Vulnerability Database Vulnerabilities #VU131306

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: 9.3 [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]

CVE-ID: CVE-2026-41103

CWE-ID: CWE-303

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

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.

Affected software

Microsoft JIRA SAML SSO plugin
Microsoft Confluence SAML SSO plugin

How to mitigate CVE-2026-41103

Install updates from vendor's website.

Microsoft JIRA SAML SSO plugin - update to 1.3.3
Microsoft Confluence SAML SSO plugin - update to 7.4.0

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103

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