# CVE-2022-26134: Atlassian Confluence Server and Data Center Remote Code Execution Vulnerability

Source: https://junglewise.ai/threats/cve-2022-26134-atlassian-confluence-server-and-data-center-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-06-02. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-26134 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-06-02

An OGNL injection vulnerability in Atlassian Confluence Server and Data Center allows an unauthenticated remote attacker to execute arbitrary code. The flaw stems from improper neutralization of special elements used in expression language statements.

Technologies: [Atlassian Confluence Data Center](https://junglewise.ai/threats/technologies/confluence-data-center), [Atlassian Confluence Server](https://junglewise.ai/threats/technologies/confluence-server), [Atlassian Data Center](https://junglewise.ai/threats/technologies/data-center). Vendors: [Atlassian](https://junglewise.ai/threats/vendors/atlassian).

## Quick answers

**Is CVE-2022-26134 exploited in the wild?** Yes. CVE-2022-26134 is known to be exploited in the wild, first recorded on 2 June 2022. Treat it as urgent.

**How severe is CVE-2022-26134?** Critical severity, with a CVSS score of 9.8, published 2 June 2022.

**Which products and versions are affected?** Atlassian Confluence Server 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; Atlassian Confluence Data Center 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.

**Is there a fix for CVE-2022-26134?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2022-26134 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-26134?** Check whether you run Atlassian Confluence Data Center, Atlassian Confluence Server or Atlassian Data Center. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Atlassian Confluence Server 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
- Atlassian Confluence Data Center 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

## Timeline

- 2022-06-02: disclosed: Initial security advisory published by Atlassian
- 2022-06-02: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-06-02: exploited: Reported as being exploited in the wild at the time of disclosure

## Related threats

- [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)
- [Atlassian Confluence Data Center DoS in authenticated request handling](https://junglewise.ai/threats/cve-2026-21588-atlassian-confluence-data-center-dos-in-authenticated-request)
- [Atlassian Confluence Data Center improper authorization](https://junglewise.ai/threats/cve-2026-21586-atlassian-confluence-data-center-improper-authorization)
- [Atlassian Confluence Data Center information disclosure](https://junglewise.ai/threats/cve-2026-21579-atlassian-confluence-data-center-information-disclosure)
- [Atlassian Confluence Data Center denial of service](https://junglewise.ai/threats/cve-2026-21577-atlassian-confluence-data-center-denial-of-service)