CVE-2026-41103: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Microsoft Confluence SAML SSO plugin
Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-41103) affects the Microsoft Confluence SAML SSO plugin version 1.0.0. Due to an incorrect implementation of the authentication algorithm (CWE-303), an attacker can remotely elevate privileges without requiring prior authentication or user interaction. The CVSS v3.1 base score is 9.1, indicating critical severity with high impact on confidentiality and integrity but no impact on availability. Microsoft has published an official fix for this vulnerability, and the vendor advisory is available at the Microsoft Security Response Center.
Potential Impact
An attacker can exploit this vulnerability to gain elevated privileges remotely over the network without authentication, potentially compromising sensitive data and system integrity. There is no known exploitation in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of the Microsoft Confluence SAML SSO plugin version 1.0.0 should apply the vendor-provided patch immediately to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103 for detailed patching instructions.
CVE-2026-41103: CWE-303: Incorrect Implementation of Authentication Algorithm in Microsoft Microsoft Confluence SAML SSO plugin
Description
Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
CVSS v3.1
Score 9.1critical
Affected software
pkg:maven/microsoft/confluence-saml-sso-pluginRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-41103) affects the Microsoft Confluence SAML SSO plugin version 1.0.0. Due to an incorrect implementation of the authentication algorithm (CWE-303), an attacker can remotely elevate privileges without requiring prior authentication or user interaction. The CVSS v3.1 base score is 9.1, indicating critical severity with high impact on confidentiality and integrity but no impact on availability. Microsoft has published an official fix for this vulnerability, and the vendor advisory is available at the Microsoft Security Response Center.
Potential Impact
An attacker can exploit this vulnerability to gain elevated privileges remotely over the network without authentication, potentially compromising sensitive data and system integrity. There is no known exploitation in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of the Microsoft Confluence SAML SSO plugin version 1.0.0 should apply the vendor-provided patch immediately to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103 for detailed patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-16T19:12:36.195Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41103","vendor":"Microsoft"}]
Threat ID: 6a03655ecbff5d861008cb99
Added to database: 05/12/2026, 17:37:34 UTC
Last enriched: 06/19/2026, 17:42:13 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 63
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