CVE-2026-21570
Remote Code Execution in Atlassian Bamboo Data Center (High Severity
Publication date: 2026-03-17
Last updated on: 2026-03-17
Assigner: Atlassian
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.