CVE-2026-21571
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk69th percentile - higher than 69% of all known CVEs
Summary
Bamboo Data Center contains a critical OS command injection vulnerability (RCE) with CVSS 9.4. An authenticated attacker can execute commands on the remote system, with high impact on confidentiality, integrity, and availability. Affected versions are 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.
Risk Assessment
An attacker can take over the Bamboo server, potentially leading to full compromise of data and CI/CD infrastructure.
Recommendation
Upgrade Bamboo Data Center to version 9.6.25 or later, 10.2.18 or later, or 12.1.6 or later, as per Atlassian instructions.
Other vulnerabilities in Bamboo Data Center
See all- CVE-2026-21584High
Bamboo Data Center versions 10.0.0, 10.1.0, 10.2.0, 11.0.0, 12.0.0, and 12.1.0 have an Improper Authorization vulnerability (CVSS 7.6). An authenticated attacker can gain unintended access, potentially exposing resources or functionality, leading to sensitive information disclosure or arbitrary code execution.
- CVE-2026-21570High
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 vulnerability, with a CVSS Score of 8.6, allows an authenticated attacker to execute malicious code on the remote system.
Original NVD description (English source)
This Critical severity OS Command Injection 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 9.4 and a CVSS Vector of CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H allows an authenticated attacker to execute commands on the remote system, which has high impact to confidentiality, high impact to integrity, high impact to availability, and requires no user interaction. 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 9.6.0: Upgrade to a release greater than or equal to 9.6.25 Bamboo Data Center 10.2: Upgrade to a release greater than or equal to 10.2.18 Bamboo Data Center 12.1: Upgrade to a release greater than or equal to 12.1.6 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]).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS