CVE-2026-96763 Details
Description
A security flaw has been discovered in kvcache-ai mooncake up to 0.3.12/0.3.13.post1/0.3.14-rc1. This issue affects the function ScopedSegmentAccess::MountSegment of the file segment.cpp of the component MountSegment Request Processing. Performing a manipulation results in improper access controls. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
A security vulnerability exists in kvcache-ai Mooncake versions up to 0.3.12, 0.3.13.post1, and 0.3.14-rc1. The issue arises in the ScopedSegmentAccess::MountSegment function within segment.cpp, where missing ownership validation allows one client to manipulate another client's Transfer Engine endpoint and memory range. This flaw leads to unauthorized access and data overwriting between clients. The vulnerability can be exploited remotely, and a public exploit is available.
To address this vulnerability, it is recommended to authenticate Store clients and bind Transfer Engine endpoints to the authenticated client. Additionally, 'MountSegment' requests should be rejected if the endpoint does not belong to the caller, and the requested address range should be verified against the caller's registered memory. It is also advisable to require authentication for the Master administration HTTP endpoints and to add regression tests for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/yyymk/fea24846dc31042cb472d7bd496a8438 | [email protected] | ExploitRemedyTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-96763 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/904605 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/409018 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/409018/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-266 | Incorrect Privilege Assignment | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| kvcache-ai Mooncake | <= 0.3.12 (semver) <= 0.3.13.post1 <= 0.3.14-rc1 (semver) |
CPE
Remediation
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Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 24, 2026 | New CVE Received | [email protected] |