CVE-2026-106039
Deferred Deferred - Pending Action

Unauthenticated Task Replication in Mooncake Store

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: VulnCheck

Description
Mooncake Store master through 0.3.13.post1 contains a missing authorization vulnerability that allows unauthenticated attackers to create, steal, and falsely complete replication tasks via the coro_rpc port. Attackers can invoke CreateCopyTask, CreateMoveTask, FetchTasks, and MarkTaskToComplete with victim client UUIDs disclosed by QueryTask to hijack task queues and record replication that never occurred.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-106039
EUVD
EUVD-2026-93402

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
kvcache-ai Mooncake 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability in Mooncake Store master through 0.3.13.post1 allows unauthenticated attackers to manipulate replication tasks via the coro_rpc port. Attackers can create, steal, or falsely complete tasks by exploiting exposed functions like CreateCopyTask, CreateMoveTask, FetchTasks, and MarkTaskToComplete. They can use victim client UUIDs obtained from QueryTask to hijack task queues and record non-existent replication activities.

Detection Guidance

Check for unauthorized access to the coro_rpc port (default port not specified) by monitoring network traffic for suspicious RPC calls like CreateCopyTask, CreateMoveTask, FetchTasks, or MarkTaskToComplete. Inspect logs for task queue modifications or unexpected replication activities.

Impact Analysis

Unauthenticated attackers could misuse this flaw to falsify data replication, leading to incorrect backups, data loss, or unauthorized data movement. If replication tasks are manipulated, systems relying on these tasks for integrity or availability may fail, causing operational disruptions or compliance violations.

Compliance Impact

This vulnerability could violate compliance requirements that mandate accurate data replication and integrity, such as GDPR's accountability principle or HIPAA's integrity safeguards. Falsified replication tasks may lead to unauthorized data access or loss of audit trails, risking regulatory penalties or data breaches.

Mitigation Strategies

Restrict access to the coro_rpc port using firewalls or network policies. Update Mooncake Store to the latest version (0.3.13.post1 or later) if a patch is available. Disable or closely monitor replication task queues for unauthorized activities.

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