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Advisory details: pypa / smolagents/PYSEC-2026-543
Advisory ID pypa/smolagents/PYSEC-2026-543
Aliases CVE-2025-14931
GHSA-q9r5-6hrr-9ph7
PYSEC-2026-543
Summary Hugging Face smolagents: Unsafe deserialization in Remote Python Executor leads to RCE 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3 10.0 https://github.com/pypa/advisory-database/blob/main/vulns/smolagents/PYSEC-2026-543.yaml
Reference id Reference type URL
https://github.com/huggingface/smolagents
https://pypi.org/project/smolagents
https://www.zerodayinitiative.com/advisories/ZDI-25-1143
CVE-2025-14931 https://nvd.nist.gov/vuln/detail/CVE-2025-14931
GHSA-q9r5-6hrr-9ph7 https://github.com/advisories/GHSA-q9r5-6hrr-9ph7
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Found at https://github.com/pypa/advisory-database/blob/main/vulns/smolagents/PYSEC-2026-543.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2025-12-26T14:34:12Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/14xxx/CVE-2025-14931.json

Source Advisory: vulnrichment/CVE-2025-14931

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]