{"id":"cisa-kev-cve-2026-21589","seq":9,"kind":"advisory","title":"[悪用確認] CVE-2026-21589: Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21589","permalink":"https://vulnpulse.app/items/cisa-kev-cve-2026-21589","summary":"Atlassian Multiple Products\nMultiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.\n対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. (期限 2026-10-18)","severity":"critical","techs":["atlassian"],"cves":["CVE-2026-21589"],"tags":["exploited","kev","Atlassian","Multiple Products"],"source":{"id":"cisa-kev","name":"CISA Known Exploited Vulnerabilities"},"published_at":"2026-10-15T00:00:00.000Z","fetched_at":"2026-10-21T16:17:45.406Z"}