CISA-confirmed known exploited vulnerability

CVE-2022-26134

Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability

Atlassian · Confluence Server/Data Center

Vulnerability details

Atlassian Confluence Server and Data Center contain a remote code execution vulnerability that allows for an unauthenticated attacker to perform remote code execution.

Added to CISA KEV: 2022-06-02

Ransomware campaign use: Known

CISA due date: 2022-06-06

Defensive guidance from CISA

Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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