# CVE-2026-21589: Attackers can read private files on Atlassian servers

Status: Being used now (CISA KEV, added 2026-10-15)
Who: Companies that run Jira, Confluence, Bitbucket or other Atlassian Data Center products.
Do this: Apply Atlassian's security update for your Data Center products.

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Atlassian Multiple Products (CVE-2026-21589) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-21589. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
Multiple 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.

## Sources
- https://confluence.atlassian.com/security/cve-2026-21589-arbitrary-file-access-vulnerability-impacts-multiple-products-1870495748.html?ref=labs.watchtowr.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-21589
- https://nvd.nist.gov/vuln/detail/CVE-2026-21589

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.