CVE-2026-55225

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In Strimzi 1.0.0 and earlier, an attacker who can create a Kafka custom resource can set Kafka.spec.entityOperator watchedNamespace to a target namespace, causing the Cluster Operator to create a Role with full Secret CRUD permissions there and bind it to the Entity Operator ServiceAccount in the attacker's namespace. The attacker can mint a token for that ServiceAccount and read or write Secrets in any target namespace where the Cluster Operator has been granted permissions, regardless of STRIMZI_NAMESPACE. This issue is fixed in versions 1.0.1 and 1.1.0."}], "source": {"advisory": "GHSA-mw9r-p8xp-wx96", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-15T19:02:30.423631Z", "id": "CVE-2026-55225", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T19:44:47.681Z"}}, {"affected": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:amq_streams:3.2::el9"], "defaultStatus": "unaffected", "packageName": "cluster-operator", "product": "Streams for Apache Kafka 3.2.1", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:amq_streams:2"], "defaultStatus": "affected", "packageName": "cluster-operator", "product": "streams for Apache Kafka 2", "vendor": "Red Hat"}], "datePublic": "2026-06-17T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "When the Strimzi cluster operator is deployed with watchAnyNamespace=true (or a multi-namespace list), any namespace editor can set Kafka.spec.entityOperator.userOperator.watchedNamespace (or topicOperator.watchedNamespace) to an arbitrary namespace. The cluster operator then creates a Role granting full CRUD on Secrets in the target namespace and a RoleBinding pointing to a ServiceAccount in the attacker's namespace \u2014 effectively granting cluster-admin-equivalent access via kube-system secret exfiltration. The RBAC objects created cross-namespace have their ownerReferences deliberately stripped, making the privilege grant persistent even after the Kafka CR or attacker namespace is deleted. Fixed in Strimzi 1.0.1 and 1.1.0 by adding a dedicated environment variable to explicitly enable the watched namespace feature (disabled by default)."}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-250", "description": "Execution with Unnecessary Privileges", "lang": "en", "type": "CWE"}]}], "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-55225"}, {"name": "RHBZ#2490275", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490275"}, {"tags": ["x_sadp-csaf-vex"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55225.json"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:54435"}], "solutions": [{"lang": "en", "value": "RHSA-2026:54435: Streams for Apache Kafka 3.2.1"}], "timeline": [{"lang": "en", "time": "2026-05-20T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-06-17T00:00:00.000Z", "value": "Made public."}], "title": "strimzi-cluster-operator: Cross-namespace privilege escalation via Kafka.spec.entityOperator.watchedNamespace in Strimzi", "workarounds": [{"lang": "en", "value": "For users who cannot upgrade immediately, deploy a Kubernetes admission policy agent (such as Kyverno or OPA Gatekeeper) to block or restrict the use of the `watchedNamespace` field in Kafka custom resources (`Kafka.spec.entityOperator.userOperator.watchedNamespace` and `Kafka.spec.entityOperator.topicOperator.watchedNamespace`). Additionally, audit existing Kafka custom resources for unexpected `watchedNamespace` configurations and review RoleBindings in sensitive namespaces."}], "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-09-16T12:04:21.530Z"}}]}}

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