Atlassian Data Center vulnerability CVE-2026-21589 (CVSS 9.3) allows arbitrary file access in Jira, Confluence and Bitbucket. Patch now. Related Posts: Murrelektronik Will Not Fix Critical AAS Edge Client Flaw CVE-2026-94293, Urges Removal Researchers Publish Full Details and PoC Exploit for a WordPress libheif RCE Chain PoC Exploit and Technical Details Released for LibreOffice Calc Code Execution Flaw CVE-2026-63277 The post Critical Atlassian Flaw CVE-2026-21589 Exposes Files in Jira, Conf