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CVE-2026-82432: Apache Storm Nimbus: Blobstore Authorization Bypass via Rebalance Configuration Overrides

Apache Storm Nimbus blobstore authorization bypass via rebalance configuration overrides, fixed in 3.1.0.

CVE-2026-82432 (rated moderate) affects Apache Storm Nimbus (storm-server) versions 3.0.0 before 3.1.0. Nimbus validates topology.blobstore.map against the calling subject only at topology submission time. The rebalance operation accepts configuration overrides and strips a small set of keys but never re-runs that validation, so a caller authorized only to rebalance a topology can introduce an unauthorized blobstore map.

oss-securitySep 13, 14:30 UTC · 2d agoVulnerability CVE-2026-82432

CVE-2026-82427: Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name

Unsanitised topology.blobstore.map local names in Apache Storm enable path traversal writes on supervisors as the supervisor user.

CVE-2026-82427 affects Apache Storm Nimbus (org.apache.storm:storm-server) versions 3.0.0 before 3.1.0, rated important. Topology submitters can choose a local name for each blob in topology.blobstore.map, which AsyncLocalizer and Container.createBlobstoreLinks used to build paths under the topology's working directory without normalisation. Crafted names allow path traversal, letting a submitter create or overwrite files outside the intended directory on supervisors, with symlink handling also affected. Fixed in version 3.1.0.

oss-securitySep 13, 14:21 UTC · 2d agoVulnerability CVE-2026-82427