Atlassian Patches High-Severity RCE Vulnerability in Bamboo Data Center
Atlassian has addressed a high-severity remote code execution (RCE) vulnerability, CVE-2026-21570, affecting its Bamboo Data Center application. The flaw, discovered internally through Atlassian’s security auditing program, poses significant risks to enterprise CI/CD environments, where Bamboo serves as a critical hub for automated builds, testing, and deployment.
With a CVSS 4.0 score of 8.6, the vulnerability allows authenticated attackers with elevated privileges to execute arbitrary code remotely on affected servers. Exploitation could lead to full system compromise, enabling threat actors to manipulate source code, exfiltrate sensitive build secrets, or disrupt software development operations potentially facilitating devastating supply chain attacks.
The flaw impacts multiple Bamboo Data Center versions, including:
- 9.6.x (9.6.0–9.6.23)
- 10.0.0, 10.1.0, 10.2.0
- 11.0.0, 11.1.0
- 12.x (12.0.0–12.1.2)
Atlassian has released patches to mitigate the issue, urging administrators to upgrade immediately:
- 9.6.x → 9.6.24 or later
- 10.2.x → 10.2.16
- 12.1.x → 12.1.3 or later
Patched versions are available via the Atlassian download center. Organizations running affected deployments are advised to apply updates to secure their build infrastructure.
Source: https://gbhackers.com/bamboo-data-center-and-server-vulnerability/
Atlassian cybersecurity rating report: https://www.rankiteo.com/company/atlassian
"id": "ATL1773995178",
"linkid": "atlassian",
"type": "Vulnerability",
"date": "1/2026",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'industry': 'Software/Technology',
'name': 'Atlassian',
'type': 'Company'}],
'attack_vector': 'Authenticated access with elevated privileges',
'customer_advisories': 'Organizations running affected deployments are '
'advised to apply updates.',
'data_breach': {'data_exfiltration': 'Potential',
'sensitivity_of_data': 'High',
'type_of_data_compromised': 'Sensitive build secrets, source '
'code'},
'description': 'Atlassian has addressed a high-severity remote code execution '
'(RCE) vulnerability, CVE-2026-21570, affecting its Bamboo '
'Data Center application. The flaw, discovered internally '
'through Atlassian’s security auditing program, poses '
'significant risks to enterprise CI/CD environments, where '
'Bamboo serves as a critical hub for automated builds, '
'testing, and deployment. With a CVSS 4.0 score of 8.6, the '
'vulnerability allows authenticated attackers with elevated '
'privileges to execute arbitrary code remotely on affected '
'servers. Exploitation could lead to full system compromise, '
'enabling threat actors to manipulate source code, exfiltrate '
'sensitive build secrets, or disrupt software development '
'operations potentially facilitating devastating supply chain '
'attacks.',
'impact': {'data_compromised': 'Sensitive build secrets, source code',
'operational_impact': 'Disruption of software development '
'operations, potential supply chain attacks',
'systems_affected': 'Bamboo Data Center servers'},
'post_incident_analysis': {'corrective_actions': 'Patches released for '
'affected versions',
'root_causes': 'Security flaw discovered '
'internally through Atlassian’s '
'security auditing program'},
'recommendations': 'Upgrade to patched versions immediately to secure build '
'infrastructure.',
'references': [{'source': 'Atlassian download center'}],
'response': {'communication_strategy': 'Advisory urging administrators to '
'upgrade immediately',
'containment_measures': 'Patches released for affected versions',
'remediation_measures': 'Upgrade to patched versions (9.6.24 or '
'later, 10.2.16, 12.1.3 or later)'},
'title': 'Atlassian Patches High-Severity RCE Vulnerability in Bamboo Data '
'Center',
'type': 'Remote Code Execution (RCE)',
'vulnerability_exploited': 'CVE-2026-21570'}