{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56743", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-22T19:17:28.959Z", "datePublished": "2026-07-15T19:15:30.924Z", "dateUpdated": "2026-07-15T19:15:30.924Z"}, "containers": {"cna": {"title": "Cilium may unexpectedly allow ingress traffic from the local namespace when a Kubernetes NetworkPolicy is configured with an ipBlock match", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/cilium/cilium/security/advisories/GHSA-fm8w-2m5w-9j7r"}, {"name": "https://github.com/cilium/cilium/pull/46305", "tags": ["x_refsource_MISC"], "url": "https://github.com/cilium/cilium/pull/46305"}, {"name": "https://github.com/cilium/cilium/pull/46456", "tags": ["x_refsource_MISC"], "url": "https://github.com/cilium/cilium/pull/46456"}, {"name": "https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8", "tags": ["x_refsource_MISC"], "url": "https://github.com/cilium/cilium/commit/1c84ae3b58a7cd54f7ee355e6c524c82f620eae8"}, {"name": "https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171", "tags": ["x_refsource_MISC"], "url": "https://github.com/cilium/cilium/commit/bacea640404c0805c23515353dc1681c5bf35171"}, {"name": "https://github.com/cilium/cilium/releases/tag/v1.19.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/cilium/cilium/releases/tag/v1.19.5"}], "affected": [{"vendor": "cilium", "product": "cilium", "versions": [{"version": ">= 1.19.0, < 1.19.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-15T19:15:30.924Z"}, "descriptions": [{"lang": "en", "value": "Cilium is a networking, observability, and security solution. From 1.19.0 to 1.19.4, standard Kubernetes NetworkPolicy specifications using CIDR-based ipBlock rules without pod or namespace selectors erroneously generate a wildcard namespace allow rule when Cilium is configured with a custom clusterName rather than the default any value. The parser incorrectly instantiates a pod selector on selectorless peer definitions, allowing traffic from other workloads in the same namespace as the subject of the policy. This issue is fixed in version 1.19.5."}], "source": {"advisory": "GHSA-fm8w-2m5w-9j7r", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}