Atlassian: >> Jira Data Center >> 9.15.2 Security Vulnerabilities
CVE-2026-21589
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. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. 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, 7.1.7, 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.
Known exploited
CVSS Score
9.3
EPSS Score
0.995
Published
2026-10-05
This High severity Information Disclosure vulnerability was introduced in versions 9.4.0, 9.12.0, and 9.15.0 of Jira Core Data Center.
This Information Disclosure vulnerability, with a CVSS Score of 7.4, allows an unauthenticated attacker to view sensitive information via an Information Disclosure vulnerability which has high impact to confidentiality, no impact to integrity, no impact to availability, and requires user interaction.
Atlassian recommends that Jira Core Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:
Jira Core Data Center 9.4: Upgrade to a release greater than or equal to 9.4.21
Jira Core Data Center 9.12: Upgrade to a release greater than or equal to 9.12.8
Jira Core Data Center 9.16: Upgrade to a release greater than or equal to 9.16.0
See the release notes. You can download the latest version of Jira Core Data Center from the download center.
This vulnerability was found internally.
CVSS Score
7.4
EPSS Score
0.004
Published
2024-06-18