CVE-2026-34940
CVE-2026-34940 is a high-severity vulnerability in Kubeai with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: High (CVSS 3.x base score 8.7)
- EPSS exploit prediction: 0% (36th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-19355
- Weakness: CWE-78
- Affected product: Kubeai
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-34940?
- 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.
- How severe is CVE-2026-34940?
- CVE-2026-34940 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2026-34940 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-34940?
- CVE-2026-34940 affects Kubeai. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-34940?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-34940 have an EU (EUVD) identifier?
- Yes. CVE-2026-34940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19355.
- When was CVE-2026-34940 published?
- CVE-2026-34940 was published on 2026-04-06 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:kubeai:kubeai:*:*:*:*:*:kubernetes:*:*
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