PT-2026-96928

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description An arbitrary local file read issue exists in the Confluence and Jira upload attachment tool paths. The implementation accepts an unconstrained file path and opens the referenced server-local...

Atlassian Confluence 8.9.0 < 9.2.24 / 9.3.1 < 10.2.17 (CONFSERVER-104362)

The version of Atlassian Confluence Server running on the remote host is affected by a vulnerability as referenced in the CONFSERVER-104362 advisory. - Impact: The fix for CVE-2021-23337 https://github.com/advisories/GHSA-35jh-r3h4-6jhm added validation for the variable option in .template but di...

CVE-2026-21588

This High severity DoS Denial of Service vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a...

CVE-2026-21586

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an...

CVE-2026-21586

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an...

CVE-2026-21588

This High severity DoS Denial of Service vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a...

CVE-2026-21586

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an...

EUVD-2026-78935

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an...

CVE-2026-21588

CVE-2026-21588 is a High severity Denial of Service (DoS) vulnerability in Confluence Data Center (Atlassian), introduced in versions 8.9.0 through 10.2.0. An authenticated attacker with low privileges can trigger a network-based, low-complexity DoS that causes high availability impact on the vul...

CVE-2026-21588

This High severity DoS Denial of Service vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a...

EUVD-2026-78937

This High severity DoS Denial of Service vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a...

CVE-2026-21586

An Improper Authorization vulnerability in Confluence Data Center (Atlassian), rated CVSS 4.0: 7.1 HIGH , allows an authenticated attacker to gain unintended access to resources or functionality, potentially exposing sensitive information or enabling arbitrary code execution. The flaw was introdu...

PT-2026-92135

Name of the Vulnerable Software and Affected Versions Confluence Data Center version 7.4.0 Confluence Data Center version 7.13.0 Confluence Data Center version 8.5.0 Confluence Data Center version 8.9.0 Confluence Data Center version 9.0.1 Confluence Data Center version 9.1.0 Confluence Data Cent...

CVE-2026-21588: Uncontrolled Resource Consumption

This High severity DoS Denial of Service vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a...

CVE-2026-21586: Improper Authorization

This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an...

PT-2026-92137

Name of the Vulnerable Software and Affected Versions Confluence Data Center version 8.9.0 Confluence Data Center version 9.0.1 Confluence Data Center version 9.1.0 Confluence Data Center version 9.2.0 Confluence Data Center version 9.3.1 Confluence Data Center version 9.4.0 Confluence Data Cente...

CVE-2026-73496

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the confluenceuploadattachment and confluenceuploadattachments tools pass a client-controlled filepath through src/mcpatlassian/confluence/attachments.py uploadattachment, and the...

EUVD-2026-77799

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. From 0.17.0 until 0.22.0, validateurlforssrf resolves the attacker-controlled X-Atlassian-Jira-Url and X-Atlassian-Confluence-Url header host once at middleware time, but the outbound request is built...

CVE-2026-73496 MCP Atlassian: Arbitrary server-side file read via attachment upload

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the confluenceuploadattachment and confluenceuploadattachments tools pass a client-controlled filepath through src/mcpatlassian/confluence/attachments.py uploadattachment, and the...

PT-2026-91441

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the confluence upload attachment and confluence upload attachments tools pass a client-controlled file path through src/mcp atlassian/confluence/attachments.py upload attachment, and...