EUVD-2026-77528
GHSA-qchc-32xg-c7w6
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector (code exec on supervisor required), high complexity (race condition), low privileges (tenant user), scope change to root on host.
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
5Description PRE-NVD
Articles & Coverage 1
AnalysisAI
Local privilege escalation to root in Apache Storm's setuid-root worker-launcher binary (storm-core 3.0.0) allows a tenant user with code execution on a supervisor node to redirect root-owned lchown and chmod operations to arbitrary host files via a symlink race. The binary uses FTS to walk worker directories and then re-resolves pathnames at syscall time, creating a TOCTOU window exploitable by any topology user who can write to an intermediate directory component. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) the target Apache Storm supervisor must be configured with `supervisor.run.worker.as.user=true`, which enables multi-tenant isolation and causes the setuid-root `worker-launcher` binary to be invoked; (2) the setuid-root `worker-launcher` binary must be installed on the supervisor host; (3) the attacker must have code execution on the supervisor node as a topology tenant user - meaning they must be able to submit and run a Storm topology on that cluster; (4) the topology user account must have write access to at least one intermediate directory component in the worker scratch path, which is the normal operational state for worker directories. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is meaningful but scoped to a specific deployment model. … 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 rewrites the privileged walk to operate on file descriptors obtained before the stat/classification step, eliminating the TOCTOU window entirely. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: audit all Apache Storm 3.0.0 deployments for multi-tenant use and identify which users have code execution privileges on supervisor nodes; immediately suspend execution of untrusted topology code until further assessment. …
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External POC / Exploit Code
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