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. T...
- Published
- Updated
- Exploit status
- Exploited in the wild (confirmed)
Description
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.
CISA Known Exploited Vulnerability
- Date added
- 2026-10-15
- Due date (FCEB)
- 2026-10-18
- Ransomware use
- Unknown
Required action
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| atlassian Bamboo Data Center | = All other versions | No fix listed |
| atlassian Bitbucket Data Center | = All other versions | No fix listed |
| atlassian Confluence Data Center | = All other versions | No fix listed |
| atlassian Crowd Data Center | = All other versions | No fix listed |
| atlassian Crucible Data Center | = All other versions | No fix listed |
| atlassian Fisheye Data Center | = All other versions | No fix listed |
| atlassian Jira Service Management Data Center | = All other versions | No fix listed |
| atlassian Jira Software Data Center | = All other versions | No fix listed |
| atlassian Bitbucket Data Center | >= 7.17.0, < 9.4.26 | 9.4.26 |
| atlassian Bitbucket Data Center | >= 9.5.0, < 10.2.8 | 10.2.8 |
| atlassian Bitbucket Data Center | >= 10.3.0, < 10.5.1 | 10.5.1 |
| atlassian Bitbucket Server | >= 4.6.0, <= 8.14.6 | No fix listed |
| atlassian Confluence Data Center | >= 5.10.0, < 9.2.26 | 9.2.26 |
| atlassian Confluence Data Center | >= 9.3.0, < 10.2.19 | 10.2.19 |
| atlassian crowd | >= 2.11.0, < 6.3.7 | 6.3.7 |
| atlassian crowd | >= 7.0.0, < 7.0.3 | 7.0.3 |
| atlassian crowd | >= 7.1.0, < 7.1.7 | 7.1.7 |
| atlassian crowd | >= 7.2.0, < 7.2.4 | 7.2.4 |
| atlassian jira data center | >= 7.1.0, < 9.12.40 | 9.12.40 |
| atlassian jira data center | >= 9.13.0, < 10.3.26 | 10.3.26 |
| atlassian jira data center | >= 10.4.0, < 11.3.12 | 11.3.12 |
| atlassian jira service desk | >= 3.1.0, <= 4.13.27 | No fix listed |
| atlassian jira service management | >= 4.14.0, < 5.12.40 | 5.12.40 |
| atlassian jira service management | >= 5.13.0, < 10.3.26 | 10.3.26 |
| atlassian jira service management | >= 10.4.0, < 11.3.12 | 11.3.12 |
Show 4 more
| Product | Affected versions | Fixed in |
|---|---|---|
| atlassian bamboo | >= 7.0.1, < 10.2.24 | 10.2.24 |
| atlassian bamboo | >= 11.0.0, < 12.1.12 | 12.1.12 |
| atlassian crucible | < 4.9.15 | 4.9.15 |
| atlassian fisheye | < 4.9.15 | 4.9.15 |
References
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- jira.atlassian.com issue-tracking mitigation vendor-advisory
- github.com exploit third-party-advisory
- www.cisa.gov government-resource us-government-resource