CVE-2026-13506: Atlassian DoS (Denial of Service) Bouncy Castle Dependency in Confluence Data Center
This Atlassian advisory covers CVE-2026-13506 in Confluence Data Center and Server, Crowd Data Center and Server and Fisheye/Crucible.
- CVE-2026-13506
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
- 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, Crowd Data Center and Server: 7.2.3 recommended Data Center Only and 5 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) Bouncy Castle Dependency in Confluence Data Center. Affected: 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 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)
- Crowd Data Center and Server: 7.2.0 to 7.2.2
- Crowd Data Center and Server: 7.1.0 to 7.1.5
- Crowd Data Center and Server: 7.0.0 to 7.0.2
- Crowd Data Center and Server: 6.3.0 to 6.3.6
- Crowd Data Center and Server: 6.2.0 to 6.2.6
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-13506
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
- Crowd Data Center and Server: 7.2.3 recommended Data Center Only
- Fisheye/Crucible: 4.9.14 recommended
- 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; Crowd Data Center and Server: 7.2.3 recommended Data Center Only; Fisheye/Crucible: 4.9.14 recommended.
Support dates for the fixed release lines
- Atlassian Confluence 10.2: support ends
- Atlassian Confluence 9.2: support ends
- Atlassian Confluence 7.2: support ended
More Atlassian advisories
CVE-2026-68569Oct 20, 2026BASM (Broken Authentication & Session Management) org.apache.tomcat:tomcat-catalinaCVE-2026-68495Oct 20, 2026DoS (Denial of Service) com.fasterxml.jackson.dataformat:jackson-dataformat-cborCVE-2026-66422Oct 20, 2026Improper Authorization org.apache.tomcat:tomcat-catalina Dependency in Bamboo Data CenterCVE-2026-65927Oct 20, 2026DoS (Denial of Service) org.apache.tomcat:tomcat-catalina Dependency in Bamboo Data CenterCVE-2026-75595Oct 20, 2026BASM (Broken Authentication & Session Management) io.netty:netty-handler DependencyCVE-2026-67213Oct 20, 2026DoS (Denial of Service) nanoid Dependency in Bamboo Data Center and Server
Atlassian advisories, September 2026All Atlassian advisories
Get an email when Atlassian Confluence publishes the next one.
See Atlassian Confluence's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
iPhone and Android apps · New on the App Store
Monitor future Atlassian CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
