Widely deployed enterprise CI/CD platform; authenticated RCE without user interaction could disrupt builds and infrastructure.
CVE-2026-21571
Authenticated OS command injection in Bamboo Data Center allows RCE.
Is CVE-2026-21571 being exploited?
Not confirmed. CVE-2026-21571 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.3% probability of exploitation in the next 30 days.
How severe is CVE-2026-21571?
CVE-2026-21571 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-21571?
Yes. A fix has been recorded for CVE-2026-21571. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21571 affect?
CVE-2026-21571 affects Bamboo Data Center (versions 9.6.0, 10.0.0, 10.1.0, 10.2.0, 11.0.0, 11.1.0, 12.0.0, 12.1.0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21571?
Upgrade to fixed versions: 9.6.25+, 10.2.18+, or 12.1.6+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution on Bamboo DC; attacker can run arbitrary commands, compromising host, data, and service.
Immediate action required
- affected12.1.0 to 12.1.3
- affected12.0.0 to 12.0.2
- affected11.0.0 to 11.0.8
- affected10.2.0 to 10.2.16
- affected10.1.0 to 10.1.1
- affected10.0.0 to 10.0.3
- affected9.6.2 to 9.6.24
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.