# CVE-2023-6730: Deserialization of Untrusted Data in huggingface/transformers

> Attackers can execute arbitrary code by exploiting unsafe deserialization in the Hugging Face Transformers library.

- **Severity:** Critical 9.0 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 19 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-3863-2447-669p, PYSEC-2023-300

## What is CVE-2023-6730?

CVE-2023-6730 is a critical unsafe deserialization vulnerability in huggingface/transformers, published on 19 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Deserialization of Untrusted Data in GitHub repository huggingface/transformers prior to 4.36.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2023-6730?

3 open source packages ship an affected version, including transformers. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `transformers` | PyPI | All versions | 4.36.0 |
| `transformers` | PyPI | All versions | 4.36.0 |
| `transformers` | PyPI | All versions | 4.36.0 |

Products: Huggingface Transformers.

## How do I fix CVE-2023-6730?

Upgrade transformers to 4.36.0 or later.

## Is CVE-2023-6730 being exploited?

There is no known exploitation of CVE-2023-6730 in the wild and no public exploit code.

## Other vulnerabilities in huggingface/transformers

- [CVE-2023-7018](https://insights.sbomify.com/CVE-2023-7018/): Deserialization of Untrusted Data in huggingface/transformers (critical 9.6)
- [CVE-2024-11393](https://insights.sbomify.com/CVE-2024-11393/): Hugging Face Transformers MaskFormer Model Deserialization of Untrusted Data Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-11394](https://insights.sbomify.com/CVE-2024-11394/): Hugging Face Transformers Trax Model Deserialization of Untrusted Data Remote Code Execution Vulnerability (high 8.8)
- [CVE-2026-5241](https://insights.sbomify.com/CVE-2026-5241/): Policy Bypass in LightGlue Nested Config Resolution in huggingface/transformers (high 8.0)
- [CVE-2026-4372](https://insights.sbomify.com/CVE-2026-4372/): Arbitrary Remote Code Execution via `_attn_implementation_internal` Config Injection in huggingface/transformers (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6730 and fix it if it is affected.

What it is: CVE-2023-6730 is a critical unsafe deserialization vulnerability in huggingface/transformers, published on 19 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-6730 in the wild and no public exploit code.

Affected packages and fixed versions:
- transformers (PyPI): affected all versions; fixed in 4.36.0
- transformers (PyPI): affected all versions; fixed in 4.36.0
- transformers (PyPI): affected all versions; fixed in 4.36.0

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-2023-6730/ (Markdown: https://insights.sbomify.com/CVE-2023-6730/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6730
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6730
- OSV: https://osv.dev/vulnerability/CVE-2023-6730

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6730/
Summaries are generated and may contain mistakes; the official description above is the record.