CVE-2026-59645: Atlassian DoS (Denial of Service) org.bouncycastle:bcutil-jdk18on Dependency in Bamboo Data Center
This Atlassian advisory covers CVE-2026-59645 in Bamboo Data Center and Server, Bitbucket Data Center and Server and Confluence Data Center and Server.
- CVE-2026-59645
Key facts
- Vendor rating
- High, CVSS 8.7
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber· base score 8.7, scored by bcorgAttack vector: network. Attack complexity: low. Attack requirements: none. Privileges required: none. User interaction: none. Confidentiality impact on the vulnerable system: none. Integrity impact on the vulnerable system: none. Availability impact on the vulnerable system: high. Confidentiality impact on subsequent systems: none. Integrity impact on subsequent systems: none. Availability impact on subsequent systems: none.- Weakness
- CWE-674 Uncontrolled Recursion
- CISA SSVC
- Exploitation: none observed. Automatable: yes. Technical impact: partial. CISA, .
- CISA KEV
- Not listed (catalogue checked )
- Affected
- Bamboo Data Center and Server: 12.1.0 to 12.1.11 (LTS); Bamboo Data Center and Server: 12.0.0 to 12.0.2; Bamboo Data Center and Server: 11.0.0 to 11.0.8 and 13 more below
- Fixed in
- Bamboo Data Center and Server: 12.1.12 (LTS) recommended Data Center Only, Bamboo Data Center and Server: 10.2.24 (LTS) Data Center Only, Bitbucket Data Center and Server: 10.5.1 Data Center Only and 11 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) org.bouncycastle:bcutil-jdk18on Dependency in Bamboo Data Center. Affected: Bamboo Data Center and Server, Bitbucket Data Center and Server, Confluence Data Center and Server, Crowd Data Center and Server, Fisheye/Crucible, Jira Data Center and Server, Jira Service Management Data Center and Server.
Listed in Atlassian's Security Bulletin of October 20 2026.
Text from the source record.
- Bamboo Data Center and Server: 12.1.0 to 12.1.11 (LTS)
- Bamboo Data Center and Server: 12.0.0 to 12.0.2
- Bamboo Data Center and Server: 11.0.0 to 11.0.8
- Bamboo Data Center and Server: 10.2.0 to 10.2.23 (LTS)
- Bamboo Data Center and Server: 10.1.0 to 10.1.1
- Bamboo Data Center and Server: 10.0.3
- Bitbucket Data Center and Server: 10.5.0
- Bitbucket Data Center and Server: 10.4.1 to 10.4.3
- Bitbucket Data Center and Server: 10.3.0 to 10.3.2
- Bitbucket Data Center and Server: 10.2.0 to 10.2.7 (LTS)
- Bitbucket Data Center and Server: 10.1.1 to 10.1.5
- Bitbucket Data Center and Server: 10.0.0 to 10.0.2
- Bitbucket Data Center and Server: 9.6.0 to 9.6.5
- Bitbucket Data Center and Server: 9.5.0 to 9.5.2
- Bitbucket Data Center and Server: 9.4.0 to 9.4.24 (LTS)
- Bitbucket Data Center and Server: 9.3.0 to 9.3.2
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-59645
Upgrade to a fixed release named by Atlassian:
- Bamboo Data Center and Server: 12.1.12 (LTS) recommended Data Center Only
- Bamboo Data Center and Server: 10.2.24 (LTS) Data Center Only
- Bitbucket Data Center and Server: 10.5.1 Data Center Only
- Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only
- Bitbucket Data Center and Server: 9.4.26 (LTS) Data Center Only
- Confluence Data Center and Server: 11.0.0 Data Center Only
- Confluence Data Center and Server: 10.2.19 (LTS) recommended Data Center Only
- Confluence Data Center and Server: 9.2.26 (LTS) Data Center Only
- Crowd Data Center and Server: 7.2.4 recommended Data Center Only
- Fisheye/Crucible: 4.9.15 recommended
- Jira Data Center and Server: 11.3.12 (LTS) recommended Data Center Only
- Jira Data Center and Server: 10.3.26 (LTS) Data Center Only
- Jira Service Management Data Center and Server: 11.3.12 (LTS) recommended Data Center Only
- Jira Service Management Data Center and Server: 10.3.26 (LTS) Data Center Only
Vendor guidance
- Upgrade to a fixed version listed by Atlassian: Bamboo Data Center and Server: 12.1.12 (LTS) recommended Data Center Only; Bamboo Data Center and Server: 10.2.24 (LTS) Data Center Only; Bitbucket Data Center and Server: 10.5.1 Data Center Only; Bitbucket Data Center and Server: 10.2.8 (LTS) recommended Data Center Only.
Support dates for the fixed release lines
- Atlassian Confluence 10.2: support ends
- Atlassian Confluence 9.4: support ends
- Atlassian Confluence 11.0: support ends
- Atlassian Confluence 9.2: support ends
- Atlassian Confluence 7.2: support ended
More Atlassian advisories
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