CVE-2026-91006

{"id": "CVE-2026-91006", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-91006", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-29T03:55:20.472246Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"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"}]}], "published": "2026-09-28T11:16:48.200", "references": [{"url": "https://lists.apache.org/thread/olzy0yjw82b20w59vonfjr1x7v5yzocr", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/09/28/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "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\u00a0/bin/sh\u00a0(Unix) or\u00a0cscript\u00a0(Windows). The caller-supplied\u00a0javaOpts\u00a0value is spliced into that string unquoted. A javaOpts value containing shell metacharacters (;,\u00a0|,\u00a0`,\u00a0$(...)) 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.\n\n\nReachable via the shell commands\u00a0instance:create,\u00a0instance:start,\u00a0instance:restart,\u00a0instance:change-opts, and the equivalent\u00a0InstanceMBean\u00a0JMX operations (createInstance,\u00a0startInstance,\u00a0changeJavaOpts,\u00a0cloneInstance).\n\nMitigation\u00a0 * Set\u00a0karaf.secured.command.compulsory.roles=admin\u00a0in\u00a0etc/system.properties\u00a0to close the fail-open gap for all unconfigured command scopes.\n * Restrict which principals can reach\u00a0instance:*\u00a0commands and\u00a0InstancesMBean\u00a0via\u00a0etc/users.properties\u00a0role assignments.\n * Treat\u00a0javaOpts\u00a0passed to instance:create/instance:start/instance:change-opts/InstancesMBean\u00a0as untrusted input only from fully-trusted operators."}], "lastModified": "2026-10-08T19:19:50.990", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:karaf:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "532915B7-A52C-450A-A6BF-0FAE4B4144CD", "versionEndExcluding": "4.4.12"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}