Actively exploited Atlassian flaw CVE-2026-21589 (CVSS 9.3) hits 8 products, CISA sets 3-day deadline
TechNadu · x · 2026-10-16
CVE-2026-21589 (CVSS 9.3), an Atlassian file access vulnerability, is being actively exploited in the wild. It affects 8 Data Center products including Jira, Confluence, and Bitbucket, letting unauthenticated remote attackers with knowledge of exact file paths read sensitive files within the web application root directory. CISA added it to the KEV catalog on Oct 15 with an Oct 18 remediation deadline, requiring federal agencies to apply patches and conduct forensic triage.
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