Security1 hOctober 22, 2026, 08:20

CVE-2026-21589 hits eight Atlassian Data Center products

CVE-2026-21589 affects eight Atlassian Data Center products, including Confluence, Jira and Crowd. ZoomEye scans found 1,868,360 exposed Confluence instances versus 91,928 Jira, but patch priority should follow business criticality, not asset counts.

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CVE-2026-21589 hits eight Atlassian Data Center products

CVE-2026-21589 affects eight Atlassian Data Center products
ZoomEye counted 1,868,360 exposed Confluence and 91,928 Jira assets
A vulnerable Crowd instance keeps the API exploitation chain open
Atlassian advises disconnecting unpatched instances from the internet

#Atlassian#Confluence#Jira#Crowd

Atlassian CVE-2026-21589 Exploited Hours After Details Go Public

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Atlassian warns of critical file access flaw in datacenter products

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CISA adds critical Atlassian flaw to Known Exploited Vulnerabilities catalog

Security

CVE-2026-21589 hits eight Atlassian Data Center products

Atlassian CVE-2026-21589 Exploited Hours After Details Go Public

Atlassian warns of critical file access flaw in datacenter products

CISA adds critical Atlassian flaw to Known Exploited Vulnerabilities catalog

ZoomEye Finds 185,584 Exposed Confluence and 91,979 Jira Instances