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Type:
Public Security Vulnerability
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Resolution: Fixed
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Priority:
Highest
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Affects Version/s: 10.0.0, 10.1.1, 10.1.2, 10.2.0, 10.2.1, 10.3.0, 10.3.1, 10.3.2, 10.3.3, 10.3.4, 10.3.5, 10.3.6, 10.3.7, 10.3.8, 10.3.9, 10.3.10, 10.3.11, 10.3.12, 10.3.13, 10.3.14, 10.3.15, 10.4.0, 10.4.1, 10.5.0, 10.5.1, 10.6.0, 10.6.1, 10.7.1, 10.7.2, 10.7.3, 10.7.4, 11.0.0, 11.1.0, 11.0.1, 11.1.1, 11.2.0, 11.2.1, 11.3.0, 11.3.1, 11.3.2, 11.3.3, 11.3.4, 11.3.5, 11.3.6, 11.3.7, 11.3.8, 11.3.9, 11.3.10, 10.3.16, 10.3.17, 10.3.18, 10.3.19, 10.3.20, 10.3.21, 10.3.22, 10.3.23, 10.3.24
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Component/s: None
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9.3
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Critical
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CVE-2026-8763
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Atlassian (Internal)
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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/U:Amber
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BASM (Broken Authentication & Session Management)
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Jira Service Management Data Center
This is a vulnerability in a non-Atlassian Jira Service Management dependency. Atlassian's application of this dependency presents a lower, non-critical assessed risk.
This Critical severity BASM (Broken Authentication & Session Management) vulnerability was introduced in versions 10.0.0, 10.1.1, 10.2.0, 10.3.0, 10.4.0, 10.5.0, 10.6.0, 10.7.1, 11.0.0, 11.1.0, 11.2.0, and 11.3.0 of Jira Service Management Data Center.
This BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 9.3 and a CVSS Vector of 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/U:Amber allows an unauthenticated attacker to perform actions as another user.
Atlassian recommends that Jira Service Management Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
- Jira Service Management Data Center 10.3: Upgrade to a release greater than or equal to 10.3.25
- Jira Service Management Data Center 11.3: Upgrade to a release greater than or equal to 11.3.11
See the release notes (https://confluence.atlassian.com/servicemanagement/jira-service-management-release-notes-780083086.html). You can download the latest version of Jira Service Management Data Center from the download center (https://www.atlassian.com/software/jira/service-management/download-archives).
The National Vulnerability Database provides the following description for this vulnerability: In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).