CVE-2026-25874: LeRobot through 0.5.1 contains an unsafe deserialization vulnerability in the async inference pipeline where p

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-25874 is a critical-severity flaw (CVSS 9.8) affecting lerobot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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, SendObservati

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	15.5% (top 3%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-04-23
Last modified	2026-10-26

Publisher (CNA): VulnCheck · Vendor: huggingface

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-23 20:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

huggingface lerobot UPGRADE

Affected: <= 0.5.1

Fixed in: newer than 0.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show lerobot

2. UPGRADE to newer than 0.5.1

pip install --upgrade "lerobot>0.5.1"

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: chocapikk.com/posts/2026/lerobot-pickle-rce/
Write-up: github.com/huggingface/lerobot/issues/3047
Write-up: www.vulncheck.com/advisories/lerobot-unsafe-deserialization-remote-code-execution-via-grpc

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25874?

lerobot: upgrade to newer than 0.5.1. Exact commands for each OS are on this page.

Is CVE-2026-25874 being exploited?

CVE-2026-25874 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25874 affect?

CVE-2026-25874 affects lerobot. Severity is critical (CVSS 9.8). 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 c

How urgent is CVE-2026-25874?

Priority 72/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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