BASM (Broken Authentication & Session Management) in Jira Data Center

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    • 8.8
    • High
    • CVE-2026-21582
    • Penetration Testing
    • CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
    • BASM (Broken Authentication & Session Management)
    • Jira Core Server

      This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduced in version ? of Jira Data Center.

      This BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user.

      Atlassian recommends that Jira 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 Data Center 9.x: Upgrade to a release greater than or equal to 9.12.38
      • Jira Data Center 10.x: Upgrade to a release greater than or equal to 10.3.24
      • Jira Data Center 11.x: Upgrade to a release greater than or equal to 11.3.10

      See the release notes (https://confluence.atlassian.com/display/JIRASOFTWARE/JIRA+Software+11.3.x+release+notes). You can download the latest version of Jira Data Center from the download center (https://www.atlassian.com/software/jira/download-archives).

      This vulnerability was reported via our Penetration Testing program.

              Assignee:
              Michal Samujlo
              Reporter:
              Security Metrics Bot
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                Created:
                Updated:
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