Critical Atlassian Flaw CVE-2026-21589 Exposes Files in Jira, Confluence, Bitbucket and Five More Products Vulnerability Report Critical Atlassian Flaw CVE-2026-21589 Exposes Files in Jira, Confluence, Bitbucket and Five More Products Do Son October 6, 2026 0 TL;DR Atlassian has patched CVE-2026-21589, a critical Atlassian Data Center vulnerability with a CVSS score of 9.3.... Read More Read more about Critical Atlassian Flaw CVE-2026-21589 Exposes Files in Jira, Confluence, Bitbucket and Five More Products