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CRITICAL severity

CVE-2023-6730 — transformers

CRITICALFix: huggingface/transformers@1d63b0e

CVE-2023-6730 is a critical-severity (CVSS 9) Deserialization of Untrusted Data vulnerability in transformers. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for transformers — see the affected versions and patch details below.

Deserialization of Untrusted Data in huggingface/transformers

Also known asGHSA-3863-2447-669pPYSEC-2023-300
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.48%0.95%1.43%0.2%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍transformers

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPItransformersall versions4.36.0pip install --upgrade 'transformers==4.36.0'

Affected Products

1 product · 1 configurations
Application
transformershuggingface
< 4.36.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Deserialization of Untrusted Data in GitHub repository huggingface/trans…

huntr.comNVDDec 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for transformers, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update transformers to 4.36.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-6730 is resolved across your whole dependency graph.

  3. Workarounds

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

Deserialization of Untrusted Data in GitHub repository huggingface/transformers prior to 4.36.
O3 Security · Impact-Aware SCA

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CVE-2023-6730: transformers — Fixed in 4.36.0