Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

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...

CVE-2026-21589: Critical unauthenticated arbitrary file access in Atlassian products

Overview On October 5, 2026, Atlassian published a security advisory for CVE-2026-21589, a critical arbitrary file access vulnerability affecting eight products: Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crow...

Atlassian Data Center Flaw Draws Exploitation Attempts Within Two Hours of Public Details

Threat actors have begun to exploit a newly disclosed critical security flaw impacting Atlassian Data Center products that could allow access to sensitive files under certain conditions. The arbitrary file access flaw, tracked as CVE-2026-21589 CVSS score: 9.3 affects multiple products, including...

VulnCheck KEV: CVE-2026-21589

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...

EUVD-2026-92807

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...

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 fil...

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 fil...

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 fil...

CVE-2026-21589

CVE-2026-21589 is a critical (CVSS 4.0: 9.3) pre-authentication arbitrary file read vulnerability affecting multiple Atlassian Data Center products, including Jira, Confluence, Bitbucket, Bamboo, Crowd, Crucible, and Fisheye. The root cause lies in the shared atlassian-plugins-webresource library...

Atlassian Jira < 9.12.40 / 10.3.x < 10.3.26 / 11.3.x < 11.3.12 (JRASERVER-79546)

The version of Atlassian Jira Server running on the remote host is affected by a vulnerability as referenced in the JRASERVER-79546 advisory. - h3. Summary This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center,...

Atlassian Jira Service Management Data Center and Server < 5.12.40 / 10.3.x < 10.3.26 / 11.3.x < 11.3.12 (JSDSERVER-16809)

The version of Atlassian Jira Service Management Data Center and Server Jira Service Desk running on the remote host is affected by a vulnerability as referenced in the JSDSERVER-16809 advisory. - This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Da...

CVE-2026-21589: Files or Directories Accessible to External Parties

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 fil...

PT-2026-106255

Name of the Vulnerable Software and Affected Versions Bitbucket Data Center versions 4.6.0 through 9.4.25, 10.2.7, and 10.5.0 Confluence Data Center versions 5.10.0 through 9.2.25 and 10.2.18 Crowd Data Center versions 2.11.0 through 6.3.6, 7.0.2, 7.1.6, and 7.2.3 Jira Software Data Center versio...

RCE (Remote Code Execution) at io.netty dependency in Bamboo Data Center

This is a vulnerability in a non-Atlassian Bamboo Data Center dependency. Atlassian's application of this dependency presents a lower, non-critical assessed risk. This Critical severity RCE Remote Code Execution vulnerability was introduced in versions 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 o...

File Inclusion at postcss Dependency in Bamboo Data Center

This High severity File Inclusion vulnerability was introduced in versions 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This File Inclusion vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N allows an unauthenticated...

RCE (Remote Code Execution) at jackson-databind Dependency in Bamboo Data Center

This High severity RCE Remote Code Execution vulnerability known as CVE-2026-54513 was introduced in 10.1.0 and later of Bamboo Data Center. This RCE Remote Code Execution vulnerability, with a CVSS Score of 8.1 and a CVSS Vector of CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H allows an...

DoS (Denial of Service) at tools.jackson.core:jackson-databind Dependency in Bamboo Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 8.1 and a CVSS Vector of CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H allows an...

DoS (Denial of Service) at org.apache.tomcat:tomcat-coyote Dependency in Bamboo Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an...

EUVD-2026-62207

This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.6, allows an authenticated attacker to gain unintended access and can lead...

CVE-2026-21584

This High severity Improper Authorization vulnerability was introduced in versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.6, allows an authenticated attacker to gain unintended access and can lead...