Critical Atlassian Bamboo Data Center and Server Flaw Enables Command Injection Attacks
\n \t
\n
<\/BR>
\n
\n \t
\n
<\/BR><\/p>\n
Atlassian has disclosed two significant security vulnerabilities affecting its Bamboo Data Center and Server product, including a critical OS command injection flaw and a high-severity denial-of-service issue tied to a third-party dependency. Organizations running affected versions are strongly urged to apply patches immediately.<\/p>\n
The most severe of the two vulnerabilities, tracked as CVE-2026-21571, carries a CVSS score of 9.4 (Critical) and affects Bamboo Data Center and Server across multiple version branches.<\/p>\n
Classified as an OS Command Injection vulnerability<\/a>, this flaw could allow a remote attacker to execute arbitrary operating system commands on the underlying server, potentially leading to full system compromise, lateral movement across networks, or sensitive data exfiltration.<\/p>\n The vulnerability impacts the following Bamboo versions:<\/p>\n Atlassian recommends upgrading<\/a> to 12.1.6 (LTS) for Data Center deployments or 10.2.18 (LTS) as an alternative patched release.<\/p>\n The second vulnerability, CVE-2026-33871, scores 8.7 (High) and stems from a denial-of-service weakness in the third-party An attacker exploiting this flaw could overwhelm the server\u2019s HTTP\/2 processing, causing service disruption and degraded availability for CI\/CD pipelines relying on Bamboo.<\/p>\n Atlassian clarified that while the underlying dependency carries an inherently higher risk rating in isolation, their specific application of the library presents a lower, non-critical assessed risk, though patching remains strongly advised.<\/p>\n Bamboo is a widely deployed CI\/CD automation server used in enterprise software development pipelines, making it an attractive target for threat actors seeking to infiltrate development supply chains or inject malicious code into build processes.<\/p>\n Command injection vulnerabilities in such environments are particularly dangerous, as they can enable attackers to tamper with build artifacts or harvest credentials stored within pipeline configurations.<\/p>\n Atlassian has made fixed versions available through its official download archives<\/a>. Administrators should audit currently deployed Bamboo versions against the affected ranges and prioritize upgrading to the recommended LTS releases without delay.<\/p>\n Network-level restrictions on Bamboo\u2019s administrative interfaces can serve as a temporary mitigation while patches are applied.<\/p>\n Follow us on Google News<\/a>, LinkedIn<\/a>, and X<\/a> for daily cybersecurity updates. Contact us<\/a> to feature your stories.<\/strong><\/p>\n The post Critical Atlassian Bamboo Data Center and Server Flaw Enables Command Injection Attacks<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\n\n
High-Severity DoS Via Netty Dependency (CVE-2026-33871)<\/strong><\/h2>\n
io.netty:netty-codec-http2<\/code> library bundled with Bamboo.<\/p>\n