Severity: important
Affected versions:
- Apache Storm Nimbus (org.apache.storm:storm-server) 3.0.0 before 3.1.0
- Apache Storm UI (org.apache.storm:storm-webapp) 3.0.0 before 3.1.0
Description:
Description
getTopologyPageInfo merged the Nimbus daemon configuration with the
topology's own configuration and returned the result without redaction in the
topology_conf field of TopologyPageInfo. The Storm UI copied that value
verbatim into the configuration field of GET /api/v1/topology/{id} and of the
corresponding metrics endpoint.
Where the cluster is configured with them, the merged map includes
storm.zookeeper.auth.payload, which Storm's own documentation directs operators
to keep in storm-cluster-auth.yaml under permissions that deny access from
workers, together with the keystore and truststore passwords for the Thrift,
Netty and ZooKeeper TLS configuration, and any plugin key whose name denotes a
secret.
getTopologyPageInfo is a topology read-only operation. Under
SimpleACLAuthorizer a principal listed in topology.readonly.users or
topology.readonly.groups could therefore read daemon credentials that the
dedicated cluster configuration API, getNimbusConf, redacts and that is gated
on nimbus.users instead. The sibling operations that exist to serve
configuration were masked; the topology page, which merges in strictly more
daemon state, was not.
Mitigation
Upgrade to 3.1.0, where credential-bearing values are masked before any
configuration is served over the Nimbus API.
Users who cannot upgrade immediately should remove any principal that is not
trusted with cluster credentials from topology.readonly.users,
topology.readonly.groups, topology.users and topology.groups, and should rotate
the ZooKeeper authentication payload and any TLS keystore or truststore
passwords that were reachable through the topology page.
Credit
Wanxin Yin (yaklang.io) reported this issue to the Apache Security Team.
Credit:
Wanxin Yin (yaklang.io) (finder)
References:
https://storm.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-84179
