CVE-2025-14924
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedHugging Face Transformers megatron_gpt2 Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hugging Face Transformers. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of checkpoints. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27984.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe vulnerability exists in Hugging Face Transformers' megatron_gpt2 checkpoint parsing functionality. The flaw stems from inadequate validation of user-supplied data during deserialization of model checkpoints, allowing attackers to execute arbitrary code by providing malicious checkpoint files. Exploitation requires user interaction—specifically opening or loading a crafted checkpoint file.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 4.55.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check installed Transformers versionRun `pip show transformers` or `import transformers; print(transformers.__version__)`Affected if Version equals 4.55.0 exactly
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Verify megatron_gpt2 checkpoint support is availableCheck if the megatron_gpt2 module can be imported: `from transformers.models.megatron_gpt2 import` or look for megatron_gpt2 in installed transformers packageAffected if The megatron_gpt2 checkpoint loading module is present in the installation
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Identify checkpoint loading usage in your code or environmentSearch codebase for calls to `from_pretrained`, `safetensors`, or checkpoint loading functions that handle megatron_gpt2 format files (search for 'megatron' or 'gpt2' checkpoint file patterns)Affected if Code loads megatron_gpt2 checkpoint files via Transformers
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Determine source of loaded checkpointsAudit where checkpoint files originate - check environment variables, file paths, or user-provided inputs that point to checkpoint locationsAffected if Checkpoints are loaded from untrusted or external sources without validation
You are affected if Transformers version is exactly 4.55.0 AND your environment loads megatron_gpt2 checkpoint files, particularly from untrusted sources.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataAvoid loading checkpoints from untrusted sources and validate checkpoint integrity before deserialization. Consider running Transformers in sandboxed or isolated environments when processing external model files.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-14924 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-14924 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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