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 · last modified .
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
EPSS: 0.002 (16.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
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.