EUVD-2026-77527
GHSA-pjcp-2m43-fmv9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local TOCTOU race requires topology-submitter privileges and local filesystem access; scope changes because successful exploitation yields root on the host, impacting co-tenants.
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
4Description PRE-NVD
Articles & Coverage 1
AnalysisAI
Local privilege escalation in Apache Storm Worker Launcher 3.0.0 allows an authenticated Storm topology tenant to gain root on supervisor nodes by exploiting a TOCTOU race in the setuid-root worker-launcher binary: the binary chowns the entire worker directory to the untrusted topology user before re-reading the supervisor-written command file, creating a window in which the tenant can substitute attacker-controlled content. For Docker workers, the injected command executes with real uid 0 through an insufficiently constrained argument sanitizer that passes -v, --device, --cap-add, --security-opt, --user, --net, and positional arguments verbatim; for OCI workers, arbitrary host paths can be bind-mounted read-write and execution can be forced as another tenant's uid. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires all of the following simultaneously: (1) Apache Storm storm-core version 3.0.0 is deployed; (2) Docker or OCI worker isolation mode is explicitly enabled on the supervisor - the vulnerable worker-launcher code path is not reachable in process-based isolation; (3) the attacker holds credentials sufficient to submit topologies to the Storm cluster (i.e., is a recognized but untrusted tenant, not a fully anonymous network attacker); (4) the attacker has the ability to write to or replace files in the worker directory during the brief window between worker-launcher's chown call and its subsequent file-read, which practically requires either local shell access on the supervisor node or a mechanism to race the filesystem (achievable via rename(2) from a co-located process). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | No CVSS vector has been assigned in the source data; the independently assessed vector is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H, yielding approximately 7.8 High. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Apache Storm 3.1.0, which validates the command file before the ownership change, re-verifies file ownership on open using O_NOFOLLOW semantics, and constrains mount sources and destinations through an administrator-controlled configuration allowlist. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all Apache Storm 3.0.0 deployments in production and document which topology tenants have access to each cluster. …
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