atlassian vulnerabilities

Recent CVEs affecting atlassian products. 2 tracked.

atlassian has 2 tracked vulnerabilities, 0 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 2. Most recent: 2026-10-05. Highest priority: CVE-2026-21589 (score 88/100).

• CVE-2026-21584 HIGH 8.1 UPGRADE This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.
• CVE-2026-21589 HIGH 7.5 EXPLOITED UPGRADE UPGRADE Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

FAQ

How do I fix atlassian vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is atlassian being exploited right now?

Yes: 1 atlassian CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Which atlassian CVE should I patch first?

CVE-2026-21589 currently ranks highest (88/100): Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability.

Products

• bamboo
• bitbucket data center
• bitbucket server
• confluence data center
• crowd
• jira data center
• jira service desk

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