CVE-2026-21589 PUBLISHED

Assigner: atlassian
Reserved: 01.01.2026 Published: 05.10.2026 Updated: 06.10.2026

h3. Summary

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe.  

h3. Context

This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions.

h3. Details:

  • The vulnerability must be addressed for affected versions of: Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.1, 7.2.4 Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 Crucible, fix versions 4.9.15 Fisheye, fix version 4.9.15
  • Exploitation requires prior knowledge of the target file's exact name and path.
  • The vulnerability does not include the capability to enumerate or list directory contents.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H
CVSS Score: 9.3

Product Status

Vendor Atlassian
Product Bamboo Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 10.2.4 and later is unaffected
  • Version Patch version 12.1.12 and later is unaffected
Vendor Atlassian
Product Bamboo Server
Versions
  • Version All versions is affected
Vendor Atlassian
Product Bitbucket Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 10.2.8 and later is unaffected
  • Version Patch version 10.5.1 and later is unaffected
  • Version Patch version 9.4.26 and later is unaffected
Vendor Atlassian
Product Bitbucket Server
Versions
  • Version All versions is affected
Vendor Atlassian
Product Confluence Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 10.2.19 and later is unaffected
  • Version Patch version 9.2.26 and later is unaffected
Vendor Atlassian
Product Confluence Server
Versions
  • Version All versions is affected
Vendor Atlassian
Product Crowd Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 7.2.4 and later is unaffected
  • Version Patch version 7.1.1 and later is unaffected
  • Version Patch version 7.0.3 and later is unaffected
  • Version Patch version 6.3.7 and later is unaffected
Vendor Atlassian
Product Crowd Server
Versions
  • Version All versions is affected
Vendor Atlassian
Product Crucible Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 4.9.15 and later is unaffected
Vendor Atlassian
Product Crucible Server
Versions
  • Version All other versions is affected
  • Version Patch version 4.9.15 and later is unaffected
Vendor Atlassian
Product Fisheye Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 4.9.15 and later is unaffected
Vendor Atlassian
Product Fisheye Server
Versions
  • Version All other versions is affected
  • Version Patch version 4.9.15 and later is unaffected
Vendor Atlassian
Product Jira Service Management Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 11.3.12 and later is unaffected
  • Version Patch version 10.3.26 and later is unaffected
  • Version Patch version 5.12.40 and later is unaffected
Vendor Atlassian
Product Jira Service Management Server
Versions
  • Version All other versions is affected
  • Version Patch version 5.12.40 and later is unaffected
Vendor Atlassian
Product Jira Software Data Center
Versions
  • Version All other versions is affected
  • Version Patch version 11.3.12 and later is unaffected
  • Version Patch version 10.3.26 and later is unaffected
  • Version Patch version 9.12.40 and later is unaffected
Vendor Atlassian
Product Jira Software Server
Versions
  • Version All other versions is affected
  • Version Patch version 9.12.40 and later is unaffected

References

Problem Types

  • Path Traversal (Arbitrary Read/Write) Path Traversal (Arbitrary Read/Write)