CVE-2026-41103

critical

Description

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.

From the Tenable Blog

May 2026 Microsoft Patch Tuesday | Tenable®

May 2026 Microsoft Patch Tuesday | Tenable®

Published: 2026-05-12

Microsoft fixed 118 CVEs in the May 2026 Patch Tuesday, with no zero-days exploited in the wild or publicly disclosed for the first time since June 2024.

References

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

https://thehackernews.com/2026/05/microsoft-patches-138-vulnerabilities.html

https://securityaffairs.com/192086/uncategorized/microsoft-patch-tuesday-for-may-2026-fix-138-bugs-some-of-them-are-alarming.html

https://www.securityweek.com/microsoft-patches-137-vulnerabilities/

https://www.tenable.com/blog/microsofts-may-2026-patch-tuesday-addresses-118-cves-cve-2026-41103

Details

Source: Mitre, NVD

Published: 2026-05-12

Updated: 2026-05-16

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 9.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

EPSS

EPSS: 0.00119