CVE-2026-91006 - Apache Karaf: OS Command Injection in Child-Instance Launch (instance:* / InstancesMBean)

CVE-2026-91006 - Apache Karaf: OS Command Injection in Child-Instance Launch (instance:* / InstancesMBean)

https://cvefeed.io/rssfeed/latest.atom / Mon, 09/28/2026 - 13:49
CVE ID :CVE-2026-91006
Published : Sept. 28, 2026, 10:44 a.m. | 27 minutes ago
Description :Apache Karaf's instance-management service (InstanceServiceImpl) builds the command line used to launch a child Karaf JVM by string concatenation, then executes it through /bin/sh (Unix) or cscript (Windows). The caller-supplied javaOpts value is spliced into that string unquoted. A javaOpts value containing shell metacharacters (;, |, `, $(...)) is interpreted by the shell instead of being passed to the JVM as an option, giving arbitrary OS command execution as the Karaf process user. Reachable via the shell commands instance:create, instance:start, instance:restart, instance:change-opts, and the equivalent InstanceMBean JMX operations (createInstance, startInstance, changeJavaOpts, cloneInstance). Mitigation  * Set karaf.secured.command.compulsory.roles=admin in etc/system.properties to close the fail-open gap for all unconfigured command scopes. * Restrict which principals can reach instance:* commands and InstancesMBean via etc/users.properties role assignments. * Treat javaOpts passed to instance:create/instance:start/instance:change-opts/InstancesMBean as untrusted input only from fully-trusted operators.
Severity: 0.0 | NA
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