CVE-2026-13006: Injection ch.qos.logback:logback-core Dependency in Confluence Data Center
CVE-2026-13006 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- High
- CVSS base score
- 7 (Atlassian), 6 (Red Hat)
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N(Red Hat)
- Weakness
- CWE-94
- Fixed releases
- Atlassian: 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
- Listed by VulniPulse
- Record changed
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-13006; each belongs to its advisory, not to every product listed. How records are collected and checked.
How do I fix CVE-2026-13006?
Upgrade to a fixed release named by the vendor:
- Atlassian: 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
- Upgrade to a fixed version listed by Atlassian: 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. (Atlassian)
Vendor advisories for CVE-2026-13006
Atlassian
1 advisory- Advisory severityHigh7.0
High [CVE-2026-13006] Injection ch.qos.logback:logback-core Dependency in Confluence Data Center
CVE-2026-13006Source published
Injection ch.qos.logback:logback-core Dependency in Confluence Data Center. Affected: Confluence Data Center and Server. Listed in Atlassian's Security Bulletin of October 20 2026.
- Affected products in this advisory
- Confluence Data Center and Server
- Source-reported affected versions
- Confluence Data Center and Server: 10.2.0 to 10.2.18 (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
7 more entries in the full advisory.
- Source-reported fixed versions
- 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
- Mitigation guidance
- Upgrade to a fixed version listed by Atlassian: 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.
Red Hat
1 advisory- Advisory severityMedium6.0
Medium [CVE-2026-13006] Arbitrary Code Execution via Malicious Configuration or Environment Variable
CVE-2026-13006Source published Source updated
ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.36 in Java applications, allows an attacker to execute arbitrary code circumventing existing protections against CVE-2025-11226 by compromising an existing logback configuration file or by injecting an environment variable before program execution. A successful attack requires the presence of Janino library to be present on the user's class path. In addition, the attacker must have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privilege. Please note that in logack version 1.5.37 conditional processing using Janino was…
- Affected products in this advisory
- Migration Toolkit for Applications 8
- OpenShift Serverless
- Red Hat AMQ Broker 7
- Red Hat AMQ Clients
18 more entries in the full advisory.
- Source-reported affected versions
- < 1.5.36
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
More Atlassian advisories
CVE-2026-75595Oct 20, 2026BASM (Broken Authentication & Session Management) io.netty:netty-handler DependencyCVE-2026-73646Oct 20, 2026Path Traversal (Arbitrary Read/Write) postcss Dependency in Confluence Data CenterCVE-2026-73508Oct 20, 2026DoS (Denial of Service) io.netty:netty-codec-dns Dependency in Bitbucket Data CenterCVE-2026-68763Oct 20, 2026DoS (Denial of Service) org.apache.tomcat:tomcat-coyote Dependency in Confluence DataCVE-2026-68569Oct 20, 2026BASM (Broken Authentication & Session Management) org.apache.tomcat:tomcat-catalinaCVE-2026-68525Oct 20, 2026Improper Authorization org.apache.tomcat:tomcat-catalina Dependency in Confluence Data
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