CVE-2026-93491: Atlassian DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bamboo Data Center
This Atlassian advisory covers CVE-2026-93491 in Bamboo Data Center and Server and Crowd Data Center and Server.
Key facts
- Vendor rating
- High, CVSS 7.5
- 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 9 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, Crowd Data Center and Server: 7.2.4 recommended Data Center Only
- 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) io.netty:netty-codec-http Dependency in Bamboo Data Center. Affected: Bamboo Data Center and Server, Crowd 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
- Crowd Data Center and Server: 7.2.0 to 7.2.3
- Crowd Data Center and Server: 7.1.0 to 7.1.7
- Crowd Data Center and Server: 7.0.0 to 7.0.3
- Crowd Data Center and Server: 6.3.0 to 6.3.7
- Crowd Data Center and Server: 6.2.0 to 6.2.6
- Crowd Data Center and Server: 6.1.2 to 6.1.7
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-93491
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
- Crowd Data Center and Server: 7.2.4 recommended 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; Crowd Data Center and Server: 7.2.4 recommended Data Center Only.
CVE-2026-93491 in other vendors' advisories
- Red Hat: CVE-2026-93491, high severity, fixed in io.netty/netty-codec-http:4.1.138.Final-redhat-00001, netty-codec-http, RHSA-2026:70257 and 3 more
More Atlassian advisories
CVE-2026-93690Oct 20, 2026DoS (Denial of Service) uri-js Dependency in Bamboo Data CenterCVE-2026-93558Oct 20, 2026DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bamboo Data CenterCVE-2026-93488Oct 20, 2026DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bamboo Data CenterCVE-2026-75596Oct 20, 2026DoS (Denial of Service) io.netty:netty-handler Dependency in Bamboo Data CenterCVE-2026-75140Oct 20, 2026DoS (Denial of Service) org.jsoup:jsoup Dependency in Bamboo Data CenterCVE-2026-68569Oct 20, 2026BASM (Broken Authentication & Session Management) org.apache.tomcat:tomcat-catalina
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