CVE-2026-21570
Received Received - Intake
Remote Code Execution in Atlassian Bamboo Data Center (High Severity

Publication date: 2026-03-17

Last updated on: 2026-03-17

Assigner: Atlassian

Description
This High severity RCE (Remote Code Execution)  vulnerability was introduced in versions 9.6.0, 10.0.0, 10.1.0, 10.2.0, 11.0.0, 11.1.0, 12.0.0, and 12.1.0 of Bamboo Data Center. This RCE (Remote Code Execution) vulnerability, with a CVSS Score of 8.6, allows an authenticated attacker to execute malicious code on the remote system. Atlassian recommends that Bamboo Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Bamboo Data Center 9.6: Upgrade to a release greater than or equal to 9.6.24 Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.16 Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.3 See the release notes ([https://confluence.atlassian.com/bambooreleases/bamboo-release-notes-1189793869.html]). You can download the latest version of Bamboo Data Center from the download center ([https://www.atlassian.com/software/bamboo/download-archives]). This vulnerability was reported via our Atlassian (Internal) program.
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Meta Information
Published
2026-03-17
Last Modified
2026-03-17
Generated
2026-06-16
AI Q&A
2026-03-17
EPSS Evaluated
2026-06-14
NVD
CVE-2026-21570
EUVD
EUVD-2026-12590
Affected Vendors & Products
Showing 9 associated CPEs
Vendor Product Version / Range
atlassian bamboo_data_center From 9.6.24 (inc)
atlassian bamboo_data_center From 10.2.16 (inc)
atlassian bamboo_data_center From 12.1.3 (inc)
atlassian bamboo_data_center From 9.6.1 (inc) to 9.6.24 (exc)
atlassian bamboo_data_center From 10.0.0 (inc) to 10.0.4 (exc)
atlassian bamboo_data_center From 10.1.0 (inc) to 10.1.2 (exc)
atlassian bamboo_data_center From 10.2.0 (inc) to 10.2.16 (exc)
atlassian bamboo_data_center From 11.0.0 (inc) to 11.0.9 (exc)
atlassian bamboo_data_center From 12.1.0 (inc) to 12.1.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Executive Summary

CVE-2026-21570 is a high-severity Remote Code Execution (RCE) vulnerability affecting Bamboo Data Center versions 9.6.1 to 9.6.23, 10.0.0 to 10.0.3, 10.1.0 to 10.1.1, 10.2.0 to 10.2.15, 11.0.0 to 11.0.8, and 12.1.0 to 12.1.2.

The vulnerability arises from a missing XML validation issue in an Apache Struts dependency used by Bamboo Data Center, which allows an authenticated attacker to execute arbitrary code remotely on affected instances.

Atlassian has released fixed versions to address this issue and recommends upgrading to Bamboo Data Center 9.6.24, 10.2.16, or 12.1.3 to mitigate the risk.

Impact Analysis

This vulnerability allows an authenticated attacker to execute malicious code remotely on your Bamboo Data Center system.

Successful exploitation could lead to unauthorized control over the affected system, potentially compromising data integrity, availability, and confidentiality.

Because the CVSS score is 8.6 (high severity), the impact is significant and could result in serious security breaches if not addressed.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

To mitigate the CVE-2026-21570 vulnerability, Atlassian recommends upgrading Bamboo Data Center to the latest fixed versions.

  • For Bamboo Data Center 9.6, upgrade to version 9.6.24 or later.
  • For Bamboo Data Center 10.2, upgrade to version 10.2.16 or later.
  • For Bamboo Data Center 12.1, upgrade to version 12.1.3 or later.

If upgrading immediately is not possible, prioritize planning for these upgrades as this vulnerability allows authenticated attackers to execute remote code.

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