Security
Atlassian Data Center Flaw Draws Exploitation Attempts Within Two Hours of Public Details
The Hacker News·October 7, 2026·1 min read
Threat actors began exploiting a newly disclosed critical flaw in Atlassian Data Center products within two hours of public details, the arbitrary file access vulnerability CVE-2026-21589 (CVSS 9.3) affects Bitbucket, Confluence, Jira Service Management, and Jira Software Data Center. The flaw could allow access to sensitive files under certain conditions, prompting urgent patching.
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