Privilege escalation in Kvcache-Ai Mooncake
CVE-2026-96763
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Kvcache-Ai Mooncake — versions 0.3.0, 0.3.1, 0.3.10
Weakness classification (CWE)
References
- vuldb.com/vuln/409018 (technical-description, vdb-entry)
- vuldb.com/vuln/409018/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-96763 (third-party-advisory)
- vuldb.com/submit/904605 (third-party-advisory)
- gist.github.com/yyymk/fea24846dc31042cb472d7bd496a8438 (exploit)
Frequently asked questions
- What is CVE-2026-96763?
- CVE-2026-96763 is a medium-severity vulnerability in Kvcache-Ai Mooncake, classified under Incorrect Privilege Assignment. CVSS score: 5.4/10. Published 2026-09-24.
- How severe is CVE-2026-96763?
- Medium severity. CVSS v3 base score is 5.4 out of 10.