CVE-2025-14931
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 smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Hugging Face smolagents. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of pickle data. 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 service account. Was ZDI-CAN-28312.
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 smolagents' Remote Python Executor where user-supplied data is deserialized using Python's pickle module without proper validation. Since pickle can execute arbitrary code during deserialization (a well-known security risk), an unauthenticated remote attacker can inject malicious serialized objects to achieve RCE in the context of the service account.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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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Verify smolagents is installedRun 'pip show smolagents' or check your project dependencies to confirm smolagents is present in the environmentAffected if smolagents package is installed in the system or project dependencies
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Identify Remote Python Executor usageSearch codebase and configuration files for imports or usage of 'RemotePythonExecutor' or 'remote_code_execution' modules from smolagents; check if any endpoint or service uses this componentAffected if Remote Python Executor from smolagents is imported or instantiated in your code or deployed service
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Confirm pickle deserialization is in useSearch code that handles deserialization in the Remote Python Executor context; look for 'pickle.load', 'pickle.loads', 'unpickle', or similar patterns receiving external/input dataAffected if The Remote Python Executor code deserializes data using pickle on user-supplied or network-received data without validation
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Check network exposure of executorReview network configuration to determine if the Remote Python Executor listens on accessible network interfaces (0.0.0.0) or is exposed without authenticationAffected if Remote Python Executor is network-accessible to untrusted clients without authentication or access controls
You are affected if smolagents with Remote Python Executor is running and deserializes untrusted input using pickle on a network-accessible endpoint.
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 dataReplace pickle deserialization with safe serialization formats (JSON) or implement cryptographic signing/validation before unpickling any untrusted data; apply network-level access controls as defense-in-depth.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-14931 — 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-2025-14931 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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