CVE-2025-14931 Hugging Face smolagents Remote Python Executor Deserialization of Untrusted Data Remote Code Execution Vulnerability
Remote attackers can execute arbitrary code via unsafe pickle deserialization in Hugging Face smolagents without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-14931?
CVE-2025-14931 is a critical unsafe deserialization vulnerability in Hugging Face smolagents, published on 23 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Hugging 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.
Weakness: CWE-502
Which versions are affected by CVE-2025-14931?
3 open source packages ship an affected version, including smolagents.
| Package | Affected | Fixed in |
|---|---|---|
smolagents PyPI | All versions to 1.23.0 | None |
smolagents PyPI | All versions to 1.23.0 | None |
smolagents PyPI | All versions to 1.23.0 | None |
How do I fix CVE-2025-14931?
No fix has been published for CVE-2025-14931 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-14931 being exploited?
There is no known exploitation of CVE-2025-14931 in the wild and no public exploit code.
Sources
Also known as GHSA-q9r5-6hrr-9ph7, PYSEC-2026-543.