# CVE-2026-106040: Mooncake Store missing authorization in disk replica eviction

Source: https://junglewise.ai/threats/cve-2026-106040-mooncake-store-master-through-0-3-13-post1-contains-a-missing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-106040 · Severity: high · CVSS 8.2 · Published 2026-10-06

Mooncake Store is a data serving platform for large language models that manages distributed storage replicas. An unauthenticated attacker with network access to the coro_rpc master port can delete any object's disk replicas across all tenants, permanently destroying data if no other copy exists.

Technologies: [Kvcache-Ai Mooncake Store](https://junglewise.ai/threats/technologies/mooncake-store). Vendors: [Kvcache-Ai](https://junglewise.ai/threats/vendors/kvcache-ai).

## Quick answers

**Is CVE-2026-106040 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-106040 being exploited in the wild.

**How severe is CVE-2026-106040?** High severity, with a CVSS score of 8.2, published 6 October 2026.

**Which products and versions are affected?** Kvcache-Ai Mooncake Store master through 0.3.13.post1.

**Is there a fix for CVE-2026-106040?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-106040 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-106040?** Check whether you run Kvcache-Ai Mooncake Store at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a missing authorization check in the EvictDiskReplica and BatchEvictDiskReplica RPC handlers in the master service. Attackers reaching the coro_rpc master port can invoke these functions without authentication to evict disk replicas belonging to any tenant, potentially causing permanent data loss if the disk replica is the only remaining copy.

## Affected products

- kvcache-ai Mooncake Store master through 0.3.13.post1

## Timeline

- 2026-10-06: disclosed

## References

- [https://github.com/kvcache-ai/Mooncake](https://github.com/kvcache-ai/Mooncake)
- [https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-store/src/master_service.cpp](https://github.com/kvcache-ai/Mooncake/blob/719735896c86b56fabec6cf3e825fb2ea640597a/mooncake-store/src/master_service.cpp)

## Related threats

- [Mooncake Store missing authorization in NotifyOffloadSuccess RPC](https://junglewise.ai/threats/cve-2026-106041-mooncake-store-master-through-0-3-13-post1-contains-a-missing)
- [Mooncake Store missing authorization in coro_rpc port](https://junglewise.ai/threats/cve-2026-106039-mooncake-store-master-through-0-3-13-post1-contains-a-missing)
- [Mooncake Store missing authentication in deletion operations](https://junglewise.ai/threats/cve-2026-106038-mooncake-store-master-through-0-3-13-post1-contains-a-missing)