CVE-2026-21577
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand auszulösen.
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 risk0.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Advisory coverage (3)
- high[UPDATE] [hoch] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: …cert-bund · 2026-09-04
- unknownMultiple vulnerabilities in Atlassian products (July 27, 2026)cert-fr-avis · 2026-07-27
- unknownCVE-2026-21577: This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1…nvd · 2026-07-21
External references
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[](https://www.csirts.com/cve/CVE-2026-21577)