CVE-2026-56745: Atlassian DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bitbucket Data Center
This Atlassian advisory covers CVE-2026-56745 in Bitbucket Data Center and Server.
Key facts
- Vendor rating
- High, CVSS 7.5
- CISA KEV
- Not listed (catalogue checked )
- Affected
- 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 and 7 more below
- Fixed in
- 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
- 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 Bitbucket Data Center. Affected: Bitbucket Data Center and Server.
Listed in Atlassian's Security Bulletin of October 20 2026.
Text from the source record.
- 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-2026-56745
Upgrade to a fixed release named by Atlassian:
- 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
Vendor guidance
- Upgrade to a fixed version listed by Atlassian: 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.
CVE-2026-56745 in other vendors' advisories
- NetApp: NTAP-20260917-0005
- Red Hat: CVE-2026-56745, high severity, fixed in 4.1.136, 4.2.16, cryostat/cryostat-reports-rhel9:4.2.0-14 and 47 more
More Atlassian advisories
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