# CVE-2026-65180: Deserialization in Megatron-LM

> An attacker can achieve remote code execution and other impacts by tricking a user into loading a malicious checkpoint file in NVIDIA Megatron-LM.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-42r9-xwp2-pv6v

## What is CVE-2026-65180?

CVE-2026-65180 is a high-severity unsafe deserialization vulnerability in NVIDIA Megatron-LM, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

NVIDIA Megatron-LM contains a vulnerability in checkpoint loading where an Attacker may cause an RCE by convincing a user to load a maliciously crafted file. A successful exploit of this vulnerability may lead to code execution, escalation of privileges, information disclosure, and data tampering.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-65180?


## How do I fix CVE-2026-65180?

No fix has been published for CVE-2026-65180 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65180 being exploited?

There is no known exploitation of CVE-2026-65180 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65180 and fix it if it is affected.

What it is: CVE-2026-65180 is a high-severity unsafe deserialization vulnerability in NVIDIA Megatron-LM, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-65180 in the wild and no public exploit code.

Affected product: NVIDIA Megatron-LM. 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-2026-65180/ (Markdown: https://insights.sbomify.com/CVE-2026-65180/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65180
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65180
- OSV: https://osv.dev/vulnerability/CVE-2026-65180

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-65180/
Summaries are generated and may contain mistakes; the official description above is the record.