ACTIVELY EXPLOITED
CVE-2022-26134: Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability
| Vendor | Atlassian |
|---|---|
| Product | Confluence Server/Data Center |
| Actively exploited | Yes |
| Added to CISA KEV | 2 Jun 2022 |
| CISA federal deadline | 6 Jun 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-917 |
Required action (CISA's text)
Immediately block all internet traffic to and from affected products AND apply the update per vendor instructions [https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html] OR remove the affected products by the due date on the right. Note: Once the update is successfully deployed, agencies can reassess the internet blocking rules.
Description (NVD)
Atlassian Confluence Server and Data Center contain a remote code execution vulnerability that allows for an unauthenticated attacker to perform remote code execution.
SOURCES
Other Atlassian flaws
- CVE-2026-21589: Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
- CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability
- CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability
- CVE-2023-22518: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability
- CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.