# CVE-2026-15531: yashbhalgat HashNeRF-pytorch Checkpoint File run_nerf.py torch.load deserialization

> Local attackers can execute arbitrary code via malicious checkpoint files in HashNeRF-pytorch due to unsafe deserialization.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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 Jul 2026
- **Updated:** 13 Jul 2026
- **Also known as:** GHSA-9wjg-4fhr-x4rw

## What is CVE-2026-15531?

CVE-2026-15531 is a medium-severity unsafe deserialization vulnerability in yashbhalgat HashNeRF-pytorch, published on 13 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been found in yashbhalgat HashNeRF-pytorch up to 82885e698295982504eb6a26d060a6b2473e3706. Affected by this issue is the function torch.load of the file run_nerf.py of the component Checkpoint File Handler. The manipulation of the argument ckpt_path leads to deserialization. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The pull request to fix this issue awaits acceptance.

Weakness: CWE-502 (Deserialization of Untrusted Data), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-15531?


## How do I fix CVE-2026-15531?

No fix has been published for CVE-2026-15531 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15531 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15531 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15531 and fix it if it is affected.

What it is: CVE-2026-15531 is a medium-severity unsafe deserialization vulnerability in yashbhalgat HashNeRF-pytorch, published on 13 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15531 exists.

Affected product: yashbhalgat HashNeRF-pytorch. 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-2026-15531/ (Markdown: https://insights.sbomify.com/CVE-2026-15531/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15531
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15531
- OSV: https://osv.dev/vulnerability/CVE-2026-15531

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-15531/
Summaries are generated and may contain mistakes; the official description above is the record.