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- 1Critical path traversal flaw hits Atlassian Bamboo Data Center●CVE-2026-21589 (CRITICAL, CVSS 9.3) in Atlassian Bamboo Data Center https:// radar.offseq.com/threat/cve-20 26-21589-pat
A new vulnerability, CVE-2026-21589, has been assigned a critical CVSS score of 9.3 in Atlassian Bamboo Data Center. The flaw is described as a path traversal issue allowing arbitrary read and write access on affected systems. Security teams running Bamboo deployments are being urged to review the advisory and patch promptly, as unpatched instances could allow attackers to read or modify files on the server.