CVE-2026-41103

CRITICAL

Published May 12, 2026 Modified May 16, 2026 CWE-303

Description

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

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CVSS v3.1 Score

9.1

CRITICAL

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

EPSS — Exploit Prediction

0.0017

Probability of exploitation

0.38%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-303 CWE-303

Affected Products

Vendor	Product	Versions
microsoft	confluence_saml_sso	< 7.4.0
microsoft	jira_saml_sso	< 1.3.3

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2026-41103? +

Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-41103? +

CVE-2026-41103 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0017, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41103? +

CVE-2026-41103 affects products from microsoft, specifically: confluence_saml_sso, jira_saml_sso. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41103? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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