Unsafe Deserialization Issue in LeRobot by Hugging Face
CVE-2026-25874

9.3CRITICAL

Key Information:

Vendor

Hugging Face

Status
Lerobot
Vendor
CVE Published:
23 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-25874?

LeRobot has a vulnerability that allows attackers to exploit unsafe deserialization within its async inference pipeline. The misuse of pickle.loads() for data deserialization over unauthenticated gRPC channels poses a significant risk. Attackers can send maliciously crafted pickle payloads through specific gRPC calls such as SendPolicyInstructions, SendObservations, or GetActions, leading to arbitrary code execution on both the server and client components. This vulnerability highlights the need for secure communication practices and diligent input validation.

Affected Version(s)

LeRobot 0 <= 0.5.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-25874 - Proof of Concept

References

https://chocapikk.com/posts/2026/lerobot-pickle-rce/
technical-descriptionexploit
https://github.com/huggingface/lerobot/issues/3047
issue-tracking
https://github.com/huggingface/lerobot/pull/3048
mitigation

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Valentin Lobstein (Chocapikk)
.