CVE-2026-73566: Atlassian DoS (Denial of Service) tar Dependency in Confluence Data Center
This Atlassian advisory covers CVE-2026-73566 in Confluence Data Center and Server, Jira Data Center and Server and Jira Service Management Data Center and Server.
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Affected
- Confluence Data Center and Server: 10.2.0 to 10.2.15 (LTS); Confluence Data Center and Server: 10.1.0 to 10.1.2; Confluence Data Center and Server: 10.0.2 to 10.0.3 and 13 more below
- Fixed in
- Confluence Data Center and Server: 10.2.17 to 10.2.18 (LTS) recommended Data Center Only, Confluence Data Center and Server: 9.2.24 to 9.2.25 (LTS) Data Center Only, Jira Data Center and Server: 11.3.11 (LTS) recommended Data Center Only and 3 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
DoS (Denial of Service) tar Dependency in Confluence Data Center. Affected: Confluence Data Center and Server, Jira Data Center and Server, Jira Service Management Data Center and Server.
Listed in Atlassian's Security Bulletin of September 15 2026.
Text from the source record.
- Confluence Data Center and Server: 10.2.0 to 10.2.15 (LTS)
- Confluence Data Center and Server: 10.1.0 to 10.1.2
- Confluence Data Center and Server: 10.0.2 to 10.0.3
- Confluence Data Center and Server: 9.5.1 to 9.5.4
- Confluence Data Center and Server: 9.4.0 to 9.4.1
- Confluence Data Center and Server: 9.3.1 to 9.3.2
- Confluence Data Center and Server: 9.2.0 to 9.2.23 (LTS)
- Confluence Data Center and Server: 9.1.0 to 9.1.1
- Confluence Data Center and Server: 8.9.7 to 8.9.8
- Confluence Data Center and Server: 8.5.16 to 8.5.31 (LTS)
- Confluence Data Center and Server: 7.19.28 to 7.19.30 (LTS)
- Jira Data Center and Server: 11.3.0 to 11.3.10 (LTS)
- Jira Data Center and Server: 11.2.0 to 11.2.1
- Jira Data Center and Server: 11.1.0 to 11.1.1
- Jira Data Center and Server: 11.0.0 to 11.0.1
- Jira Data Center and Server: 10.7.1 to 10.7.4
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-73566
Upgrade to a fixed release named by Atlassian:
- Confluence Data Center and Server: 10.2.17 to 10.2.18 (LTS) recommended Data Center Only
- Confluence Data Center and Server: 9.2.24 to 9.2.25 (LTS) Data Center Only
- Jira Data Center and Server: 11.3.11 (LTS) recommended Data Center Only
- Jira Data Center and Server: 10.3.25 (LTS) Data Center Only
- Jira Service Management Data Center and Server: 11.3.11 (LTS) recommended Data Center Only
- Jira Service Management Data Center and Server: 10.3.25 (LTS) Data Center Only
Vendor guidance
- Upgrade to a fixed version listed by Atlassian: Confluence Data Center and Server: 10.2.17 to 10.2.18 (LTS) recommended Data Center Only; Confluence Data Center and Server: 9.2.24 to 9.2.25 (LTS) Data Center Only; Jira Data Center and Server: 11.3.11 (LTS) recommended Data Center Only; Jira Data Center and Server: 10.3.25 (LTS) Data Center Only.
Support dates for the fixed release lines
- Atlassian Confluence 10.2: support ends
- Atlassian Confluence 9.2: support ends
CVE-2026-73566 in other vendors' advisories
- Red Hat: CVE-2026-73566, high severity, fixed in 7.5.21, ansible-automation-platform/automation-portal:1788775748, ansible-automation-platform/automation-portal:1788783591 and 22 more
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