CVE-2021-39115

CVE-2021-39115 Template Injection in Email Templates leads to code execution on Jira Service Management Server I Building I have provided a guide for deployment + debug here, you can refer to it. II Analysis The Description of this CVE already clearly states that the bug lies in the Email Templat...

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...

Exploit for CVE-2026-21589

CVE-2026-21589 - Atlassian Data Center Una...

Vulnerability handling in Atlassian Data Center products

The vulnerability exists in several products within the Atlassian Data Center platform, including Jira Software, Jira Service Management, Confluence, Bitbucket, Bamboo, Crowd, Crucible, and Fisheye. The vulnerability is an Arbitrary File Access issue, allowing unauthorized attackers to access...

Critical Atlassian Flaw Lets Unauthenticated Attackers Read Known Files Across 8 Products

A critical flaw in 8 Atlassian Data Center products, which customers host themselves, allows an attacker with no login access to read specific files in each product's web application root directory. The attacker must already know a file's exact name and path and cannot list what the directory...

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

Rejected reason: This CVE's publication may have been a false positive or a mistake. As a result, we have rejected this record...

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

Atlassian Data Center products (including Jira , Confluence , Bitbucket , Bamboo , Crowd , Crucible , and Fisheye ) are vulnerable to a critical pre-authentication arbitrary file read vulnerability (CVSS 4.0: 9.3) in the shared atlassian-plugins-webresource library. The root cause is improper pat...

CVE-2026-21589

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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...

PT-2026-106255

Name of the Vulnerable Software and Affected Versions Bitbucket Data Center versions prior to 9.4.26, 10.2.8, and 10.5.1 Confluence Data Center versions prior to 9.2.26 and 10.2.19 Crowd Data Center versions prior to 6.3.7, 7.0.3, 7.1.7, and 7.2.4 Jira Software Data Center versions prior to...

Atlassian Jira Service Management Data Center and Server 10.0.x < 10.3.25 / 10.4.x < 11.3.11 (JSDSERVER-16759)

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-16759 advisory. - In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. Thi...

Atlassian Jira Service Management Data Center and Server 5.15.2 < 10.3.24 / 10.4.x < 11.3.7 (JSDSERVER-16596)

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-16596 advisory. - Impact: The fix for CVE-2021-23337 https://github.com/advisories/GHSA-35jh-r3h4-6jhm added validatio...

Atlassian Jira Service Management Data Center and Server 10.0.x < 10.3.25 / 10.4.x < 11.3.11 (JSDSERVER-16751)

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-16751 advisory. - In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and UR...

Atlassian Jira Service Management Data Center and Server 10.0.x < 10.3.18 / 10.4.x < 11.3.10 (JSDSERVER-16727)

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-16727 advisory. - node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.21, node-tar's filesFilter ...