TI-2026-55331 Aliases CVE-2026-80047 GHSA-x9r9-c232-4q39

Hugging Face Transformers library writes remote code to disk prior to consent check

LOW 35CWE-273Published 2026-09-01 · Updated 2026-09-23

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-494.

Summary

A vulnerability in Hugging Face Transformers (versions 4.57.0 to 5.16.1) allows remote Python files to be written to local disk without user consent when using GenerativePreTrainedModel.load_custom_generate(). The function fetches and caches a remote module file before performing the required trust_remote_code consent check, inverting the security model enforced by other code-loading paths (such as AutoConfig, AutoModel, and AutoTokenizer). As a result, attacker‑controlled Python code from custom_generate/generate.py is copied into the user’s ~/.cache/huggingface/modules directory even if the user declines the trust prompt. Although execution is correctly gated, the file write is not reversible and can persist across sessions. This can lead to persistent, unauthorized files on disk and stale cache collisions where cached attacker code may later be executed during trusted model loads. The issue stems from an unconditional file write in dynamic_module_utils.py prior to any trust verification.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00099 0th percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
huggingface	Transformers	4.57.0 – 5.16.1	—	No fix listed	CNA
—	transformers (PyPI)	4.49.0 – 5.8.1	—	No fix listed	GHSA-x9r9-c232-4q39

Transformers Vendorhuggingface Affected 4.57.0 – 5.16.1 Fixed in — No fix listed CNA
transformers (PyPI) Vendor— Affected 4.49.0 – 5.8.1 Fixed in — No fix listed GHSA-x9r9-c232-4q39

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:huggingface:transformers::::::::	—	—	huggingface

cpe:2.3:a:huggingface:transformers:*:*:*:*:*:*:*:* Versions — — ·huggingface

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Lightspeed Core	Affected	No fix yet: Fix deferred
OpenShift Lightspeed	Affected	No fix yet: Fix deferred
Red Hat AI Inference Server	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-80047
2026-10-03 Alias added: GHSA-x9r9-c232-4q39

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-80047

Other 5

TI-2026-48351 sentence-transformers Arbitrary Code Execution on Local Model Load Despite trust_remote_code=False CVSS 4.0CRITICAL 9.3
TI-2026-20914 LeRobot Unsafe Deserialization Remote Code Execution via gRPC CVSS 4.0CRITICAL 9.3
TI-2026-04577 Policy Bypass in LightGlue Nested Config Resolution in huggingface/transformers CVSS 3.1CRITICAL 9.6
TI-2025-04589 Sandbox Escape Vulnerability in huggingface/smolagents CVSS 3.1CRITICAL 10.0
TI-2026-79938 Pickle deserialization in Hugging Face Datasets allows code execution CVSS 4.0HIGH 8.7
TI-2026-32710 Diffusers: None.py Trust Remote Code Bypass CVSS 3.1HIGH 8.8

See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences