# Atlassian Confluence Data Center vulnerabilities

Source: https://junglewise.ai/threats/technologies/confluence-data-center  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/confluence-data-center.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 14 vulnerabilities in Atlassian Confluence Data Center: 0 in the last 7 days and 3 in the last 90 days, 10 of them critical and 10 exploited in the wild. The most recent, CVE-2026-21589, was published on 5 October 2026. Nothing in the last four weeks, down from 3 vulnerabilities in the four before. 0 critical against 1, 0 exploited in the wild against 1.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 3
- All time: 14 (10 critical, 10 exploited in the wild)

## About Atlassian Confluence Data Center

Distributed content collaboration platform designed for enterprise teams to create, share and manage documentation.

## Latest Atlassian Confluence Data Center vulnerabilities

- [CVE-2026-21589: Atlassian Data Center arbitrary file access without authentication](https://junglewise.ai/threats/cve-2026-21589-h3-summary-this-is-a-vulnerability-in-bitbucket-data-center) (critical, exploited in the wild, published 5 Oct 2026)
- [CVE-2026-21588: Atlassian Confluence Data Center DoS in authenticated request handling](https://junglewise.ai/threats/cve-2026-21588-atlassian-confluence-data-center-dos-in-authenticated-request) (info, CVSS 7.1, published 15 Sep 2026)
- [CVE-2026-21586: Atlassian Confluence Data Center improper authorization](https://junglewise.ai/threats/cve-2026-21586-atlassian-confluence-data-center-improper-authorization) (info, CVSS 7.1, published 15 Sep 2026)
- [CVE-2026-21579: Atlassian Confluence Data Center information disclosure](https://junglewise.ai/threats/cve-2026-21579-atlassian-confluence-data-center-information-disclosure) (info, CVSS 8.2, published 21 Jul 2026)
- [CVE-2026-21577: Atlassian Confluence Data Center denial of service](https://junglewise.ai/threats/cve-2026-21577-atlassian-confluence-data-center-denial-of-service) (info, CVSS 7.1, published 21 Jul 2026)
- [CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability](https://junglewise.ai/threats/cve-2023-22527-atlassian-confluence-data-center-and-server-template-injection) (critical, exploited in the wild, CVSS 10, published 24 Jan 2024)
- [CVE-2023-22518: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability](https://junglewise.ai/threats/cve-2023-22518-atlassian-confluence-data-center-and-server-improper) (critical, exploited in the wild, CVSS 10, published 7 Nov 2023)
- [CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability](https://junglewise.ai/threats/cve-2023-22515-atlassian-confluence-data-center-and-server-broken-access-control) (critical, exploited in the wild, CVSS 10, published 5 Oct 2023)
- [CVE-2022-26138: Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability](https://junglewise.ai/threats/cve-2022-26138-atlassian-questions-for-confluence-app-hard-coded-credentials) (critical, exploited in the wild, CVSS 9.8, published 29 Jul 2022)
- [CVE-2022-26134: Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2022-26134-atlassian-confluence-server-and-data-center-remote-code-execution) (critical, exploited in the wild, CVSS 9.8, published 2 Jun 2022)
- [CVE-2021-26085: Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability](https://junglewise.ai/threats/cve-2021-26085-atlassian-confluence-server-pre-authorization-arbitrary-file-read) (critical, exploited in the wild, CVSS 5.3, published 28 Mar 2022)
- [CVE-2019-3396: Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability](https://junglewise.ai/threats/cve-2019-3396-atlassian-confluence-server-and-data-center-server-side-template) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021)
- [CVE-2021-26084: Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability](https://junglewise.ai/threats/cve-2021-26084-atlassian-confluence-server-and-data-center-object-graph) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021)
- [CVE-2019-3398: Atlassian Confluence Server and Data Center Path Traversal Vulnerability](https://junglewise.ai/threats/cve-2019-3398-atlassian-confluence-server-and-data-center-path-traversal) (critical, exploited in the wild, CVSS 8.8, published 3 Nov 2021)

## Most severe Atlassian Confluence Data Center vulnerabilities

- [CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability](https://junglewise.ai/threats/cve-2023-22527-atlassian-confluence-data-center-and-server-template-injection) (critical, exploited in the wild, CVSS 10, published 24 Jan 2024)
- [CVE-2023-22518: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability](https://junglewise.ai/threats/cve-2023-22518-atlassian-confluence-data-center-and-server-improper) (critical, exploited in the wild, CVSS 10, published 7 Nov 2023)
- [CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability](https://junglewise.ai/threats/cve-2023-22515-atlassian-confluence-data-center-and-server-broken-access-control) (critical, exploited in the wild, CVSS 10, published 5 Oct 2023)
- [CVE-2022-26138: Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability](https://junglewise.ai/threats/cve-2022-26138-atlassian-questions-for-confluence-app-hard-coded-credentials) (critical, exploited in the wild, CVSS 9.8, published 29 Jul 2022)
- [CVE-2022-26134: Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability](https://junglewise.ai/threats/cve-2022-26134-atlassian-confluence-server-and-data-center-remote-code-execution) (critical, exploited in the wild, CVSS 9.8, published 2 Jun 2022)
- [CVE-2019-3396: Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability](https://junglewise.ai/threats/cve-2019-3396-atlassian-confluence-server-and-data-center-server-side-template) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021)
- [CVE-2021-26084: Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability](https://junglewise.ai/threats/cve-2021-26084-atlassian-confluence-server-and-data-center-object-graph) (critical, exploited in the wild, CVSS 9.8, published 3 Nov 2021)
- [CVE-2019-3398: Atlassian Confluence Server and Data Center Path Traversal Vulnerability](https://junglewise.ai/threats/cve-2019-3398-atlassian-confluence-server-and-data-center-path-traversal) (critical, exploited in the wild, CVSS 8.8, published 3 Nov 2021)
- [CVE-2021-26085: Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability](https://junglewise.ai/threats/cve-2021-26085-atlassian-confluence-server-pre-authorization-arbitrary-file-read) (critical, exploited in the wild, CVSS 5.3, published 28 Mar 2022)
- [CVE-2026-21589: Atlassian Data Center arbitrary file access without authentication](https://junglewise.ai/threats/cve-2026-21589-h3-summary-this-is-a-vulnerability-in-bitbucket-data-center) (critical, exploited in the wild, published 5 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 3 vulnerabilities in the four before. 0 critical against 1, 0 exploited in the wild against 1.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 2 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 1 | 1 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Atlassian technologies

- [Atlassian Temporal Server](https://junglewise.ai/threats/technologies/server): 13 vulnerabilities
- [Atlassian Jira Align](https://junglewise.ai/threats/technologies/jira-align): 11 vulnerabilities
- [Atlassian Confluence Server](https://junglewise.ai/threats/technologies/confluence-server): 10 vulnerabilities
- [Atlassian Data Center](https://junglewise.ai/threats/technologies/data-center): 6 vulnerabilities
- [Atlassian Jira Data Center](https://junglewise.ai/threats/technologies/jira-data-center): 3 vulnerabilities
- [Atlassian Jira Server](https://junglewise.ai/threats/technologies/jira-server): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Atlassian Confluence Data Center vulnerabilities", https://junglewise.ai/threats/technologies/confluence-data-center, 9 November 2026.