CVE-2022-26134

9.8 Known exploited Used in ransomware

Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability

CVSS: 9.8, critical critical CVSS v3.1
EPSS, next 30 days: 100% higher than 99.9% of scored CVEs
Exploitation: Confirmed in the wild
Published: 3 Jun 20224 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 2 Jun 2022 and links it to ransomware activity. US federal agencies had to remediate by 6 Jun 2022, a deadline that has passed.

Required action. 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

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are from 1.3.0 before 7.4.17, from 7.13.0 before 7.13.7, from 7.14.0 before 7.14.3, from 7.15.0 before 7.15.2, from 7.16.0 before 7.16.4, from 7.17.0 before 7.17.4, and from 7.18.0 before 7.18.1.

Details

Vendor: Atlassian
Product: Confluence Data Center
Weakness: CWE-917 (opens in a new tab)
Status: Analyzed
Updated: 17 Jun 2026
Assigner: security@atlassian.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 7

Exploit code 4

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Atlassian CVEs

Every Atlassian CVE we hold

Same vendor in what we hold, not a known link between the flaws.

CVE-2026-21589 Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability KEV EPSS 13% 7.5, high
CVE-2023-22527 Atlassian Confluence Data Center and Server Template Injection Vulnerability KEV EPSS 100% 9.8, critical
CVE-2023-22518 Atlassian Confluence Data Center and Server Improper Authorization Vulnerability KEV EPSS 100% 9.8, critical
CVE-2023-22515 Atlassian Confluence Data Center and Server Broken Access Control Vulnerability KEV EPSS 99% 9.8, critical
CVE-2022-36804 Atlassian Bitbucket Server and Data Center Command Injection Vulnerability KEV EPSS 99% 8.8, high
CVE-2022-26138 Atlassian Questions For Confluence App Hard-coded Credentials Vulnerability KEV EPSS 98% 9.8, critical
CVE-2021-26084 Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability KEV EPSS 100% 9.8, critical
CVE-2021-26086 Atlassian Jira Server and Data Center Path Traversal Vulnerability KEV EPSS 100% 5.3, medium

Beyond this page

Is CVE-2022-26134 in your network?

This page tells you how dangerous CVE-2022-26134 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2022-26134 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.