{"schema_version":"1","data":[{"id":4042,"advisory_id":"d8930fe4-057e-4b47-82ca-b44a1a404da9","revision":1,"source_id":"core-cve","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-91006","source_published_at":"2026-09-28T10:44:32.652+00:00","published_at":"2026-10-24T21:45:14.558342+00:00","extraction_method":"structured","technologies":["apache-karaf","core-cve"],"cve_ids":["CVE-2026-91006"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apache Karaf: OS Command Injection in Child-Instance Launch (instance:* / InstancesMBean)","summary":"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.","evidence":"cve:CVE-2026-91006","products":[{"name":{"value":"Apache Karaf","evidence":"/containers/cna/affected/0/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2026-91006","aliases":["CVE-2026-91006"],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"moderate"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Karaf","versions":[{"status":"affected","version":"0","lessThan":"4.4.12","versionType":"semver"}],"packageName":"org.apache.karaf:org.apache.karaf.instance.core","defaultStatus":"unaffected"}],"modified":"2026-09-29T21:03:21.368Z","provider":"cve","references":["https://lists.apache.org/thread/olzy0yjw82b20w59vonfjr1x7v5yzocr"],"provider_metadata":{"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/28/3"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-09-28T13:10:12.951Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2026-91006","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-29T03:55:20.472246Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T21:03:21.368Z"}}],"cna":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-09-28T10:44:32.652Z"}}},"related_cves":[{"value":"CVE-2026-91006","evidence":"/cveMetadata/cveId"}],"security_relevant":true,"severity_evidence":null}}],"next_after":4042,"next_before":4042}