CVE-2026-25874

critical

Description

LeRobot through 0.5.1 contains an unsafe deserialization vulnerability in the async inference pipeline where pickle.loads() is used to deserialize data received over unauthenticated gRPC channels without TLS in the policy server and robot client components. An unauthenticated network-reachable attacker can achieve arbitrary code execution on the server or client by sending a crafted pickle payload through the SendPolicyInstructions, SendObservations, or GetActions gRPC calls.

References

https://github.com/huggingface/lerobot/issues/3134

https://chocapikk.com/posts/2026/lerobot-pickle-rce/

https://www.vulncheck.com/advisories/lerobot-unsafe-deserialization-remote-code-execution-via-grpc

https://github.com/huggingface/lerobot/pull/3048

https://github.com/huggingface/lerobot/issues/3047

Details

Source: Mitre, NVD

Published: 2026-04-23

Updated: 2026-04-23

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: Critical