# CVE-2026-96762: kvcache-ai mooncake RPC Path UnmountSegment authorization

> Attackers can bypass authorization in the Mooncake RPC UnmountSegment function by manipulating client and segment IDs, potentially disrupting cache operations.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-5j6m-8f83-35hj

## What is CVE-2026-96762?

CVE-2026-96762 is a medium-severity missing authorization vulnerability in kvcache-ai mooncake, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in kvcache-ai mooncake up to 0.3.12/0.3.13.post1. This affects the function UnmountSegment of the component RPC Path Handler. This manipulation of the argument client_id/segment_id causes authorization bypass. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-96762?


## How do I fix CVE-2026-96762?

No fix has been published for CVE-2026-96762 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-96762 being exploited?

There is no known exploitation of CVE-2026-96762 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-96762 and fix it if it is affected.

What it is: CVE-2026-96762 is a medium-severity missing authorization vulnerability in kvcache-ai mooncake, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-96762 in the wild and no public exploit code.

Affected product: kvcache-ai mooncake. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-96762/ (Markdown: https://insights.sbomify.com/CVE-2026-96762/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-96762
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-96762
- OSV: https://osv.dev/vulnerability/CVE-2026-96762

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-96762/
Summaries are generated and may contain mistakes; the official description above is the record.