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Vulnerability record · CVE-2026-25874 · published 23 April 2026

CVE-2026-25874: Huggingface lerobot deserialization of untrusted data vulnerability

Huggingface · Lerobot

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.

9.3 CVSS 4.0 Critical EPSS 0.95% · top 40.3% CWE-502 · Deserialization of untrusted data
9.3CVSS 4.0 base score
0.95%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 3 tagged exploit
14 Jul 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://chocapikk.com/posts/2026/lerobot-pickle-rce/ ExploitMitigationThird Party Advisory
https://github.com/huggingface/lerobot/issues/3047 ExploitIssue TrackingThird Party Advisory
https://github.com/huggingface/lerobot/issues/3134 Issue Tracking
https://github.com/huggingface/lerobot/pull/3048 Issue TrackingPatch
https://www.vulncheck.com/advisories/lerobot-unsafe-deserialization-remote-code-execution-via-grpc ExploitThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-25874), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.