CVE-2026-122307

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{"bugzilla": {"description": "github.com/kyverno/kyverno: Kyverno: Security policy bypass via improper exception handling in admission policy generator", "id": "2567582", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567582"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-807", "details": ["Kyverno before 1.19.2 contains a policy bypass vulnerability in the admissionpolicygenerator controller, which folds PolicyExceptions into generated ValidatingAdmissionPolicies while ignoring the --enablePolicyException, --exceptionNamespace, and policy kind gates. Users with namespaced create rights on PolicyExceptions can inject negated matchConditions into the generated policies to admit violating resources, bypassing cluster-wide enforcement.", "A flaw was found in Kyverno. This vulnerability allows an authenticated attacker with permissions to create policy exceptions to bypass cluster-wide security controls. The admission policy generator improperly folds policy exceptions into generated admission policies without enforcing configured exception gates and namespace boundaries. As a result, an attacker can admit non-compliant or violating resources into the Kubernetes cluster."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-122307", "public_date": "2026-11-05T02:25:10Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-122307\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-122307\nhttps://github.com/kyverno/kyverno/security/advisories/GHSA-qc9c-3fgf-cgq8\nhttps://www.vulncheck.com/advisories/kyverno-before-1.19.2-policy-bypass-via-admissionpolicygenerator-policyexception-handling"], "statement": "This vulnerability is rated with an Important severity because authenticated users possessing localized namespace privileges can circumvent cluster-wide admission controls, breaking security isolation boundaries to admit unauthorized workloads. Red Hat OpenShift does not package or distribute Kyverno, relying instead on built-in admission controllers and Security Context Constraints to enforce cluster security. Consequently, default Red Hat platforms are not impacted by this issue unless third-party Kyverno controllers are manually deployed.", "threat_severity": "Important"}

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