CVE-2025-14924

Code execution via unsafe checkpoint deserialization

Published Dec 23, 2025 · Updated Dec 23, 2025

Deserialization in Hugging Face Transformers commit 95faabf allows remote attackers to execute code through a malicious Megatron-GPT2 checkpoint. The megatron_gpt2 conversion script passes a directly supplied .pt checkpoint to torch.load with weights_only=False, enabling pickle object construction. Execution requires a user to run the converter on the crafted file, and the payload runs with the converter process's privileges.

CVSS severity7.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Hugging Face Transformers commit 95faabf allows remote attackers to execute code through a malicious Megatron-GPT2 checkpoint. The megatron_gpt2 conversion script passes a directly supplied .pt checkpoint to torch.load with weights_only=False, enabling pickle object construction. Execution requires a user to run the converter on the crafted file, and the payload runs with the converter process's privileges.

The record

CVE
CVE-2025-14924
Published
Dec 23, 2025
Updated
Dec 23, 2025
Vendor
Hugging Face
Product
Transformers
Classifications
CWE-502, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=95faabf0a6cd845f4c5548697e288a79e424b096

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Hugging Face · Transformersversion=95faabf0a6cd845f4c5548697e288a79e424b096

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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