Vulnerability Description
This High severity Improper Authorization vulnerability was introduced in version 11.3.0 of Jira Service Management Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. 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 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). This vulnerability was reported via our Penetration Testing program.
Related Weaknesses (CWE)
References
- https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209
- https://jira.atlassian.com/browse/JSDSERVER-16747
FAQ
What is CVE-2026-21587?
CVE-2026-21587 is a documented vulnerability. This High severity Improper Authorization vulnerability was introduced in version 11.3.0 of Jira Service Management Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1...
How severe is CVE-2026-21587?
CVSS scoring is not yet available for CVE-2026-21587. Check NVD for updates.
Is there a patch for CVE-2026-21587?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.