Atlassian flags critical Apache Axis RCE in Confluence Data Center's remote API
Atlassian published advisory CVE-2026-90436 on November 9, 2026, describing a remote code execution flaw in Apache Axis, a third-party component behind Confluence Data Center's XML-RPC and SOAP APIs. The issue applies only when the "Remote API (XML-RPC & SOAP)" setting is enabled, though older installations often keep it on for scripts and integrations that outlive their original purpose. Atlassian rates it critical with a CVSS 4.0 score of 9.3, affecting Data Center versions 1.x through 9.x, while Confluence 10.x and later and Atlassian Cloud sites are not affected. The vendor recommends upgrading to 9.2.28 or a later fixed release and disabling the remote API as an interim containment step, verified by a 403 response from the Axis service endpoint. Because Atlassian cannot confirm whether any instance has been compromised, administrators are advised to review proxy logs for SOAP and XML-RPC requests and recent account and configuration changes.
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