CVE-2026-21589

Monday, October 05, 2026

9.3

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

Summary

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.

Affected Software

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

Weaknesses

Path Traversal (Arbitrary Read/Write)

References

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