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#2 The Hacker News general October 07, 2026 at 11:49 UTC

Atlassian Data Center Flaw Draws Exploitation Attempts Within Two Hours of Public Details

By [email protected] (The Hacker News)

AI Summary

CVE-2026-21589 (CVSS 9.3), a critical arbitrary file access vulnerability affecting Atlassian Data Center products including Confluence, Jira Software, Jira Service Management, and Bitbucket, drew active exploitation attempts within two hours of public disclosure. The flaw allows unauthenticated attackers to read sensitive files in the web application root directory. Organizations running self-hosted Atlassian Data Center deployments should apply patches immediately given the speed of exploitation.

Read full article → https://thehackernews.com/2026/10/atlassian-data-c…

Relevance score: 86.0/100

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