CVE-2026-21575
An attacker can exploit multiple vulnerabilities in Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira, and Jira Service Management to execute arbitrary code, gain elevated permissions, bypass security measures, manipulate data, disclose confidential information, or trigger a denial-of-service condition.
CSIRTS triage
- What
- An attacker can exploit multiple vulnerabilities in Atlassian products to execute arbitrary code, gain elevated permissions, bypass security measures, manipulate data, disclose confidential information, or trigger a denial-of-service condition.
- Who is affected
- Users of Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira, and Jira Service Management are affected.
- Urgency
- Remediation is high urgency due to the potential for severe exploitation and active attacks.
- Action
- Update all affected Atlassian products to the latest versions immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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[](https://www.csirts.com/cve/CVE-2026-21575)