What is CVE-2026-25874?

CVE-2026-25874 is a critical-severity vulnerability in Hugging Face Lerobot, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-23.

How severe is CVE-2026-25874?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Hugging Face Lerobot

CVE-2026-25874

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.

Vulnerability class: Insecure Deserialization

Published 2026-04-23 · last modified 2026-07-14.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (59.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.155 · newest: 0.010 · change: -0.146

Affected products

Hugging Face Lerobot — versions 0
Huggingface Lerobot

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

chocapikk.com/posts/2026/lerobot-pickle-rce/ (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
github.com/huggingface/lerobot/issues/3047 (issue-tracking, Exploit, technical-description, Third Party Advisory, Issue Tracking)
github.com/huggingface/lerobot/pull/3048 (issue-tracking, Patch, mitigation, Issue Tracking)
github.com/huggingface/lerobot/issues/3134 (issue-tracking, vendor-advisory, Issue Tracking)
www.vulncheck.com/advisories/lerobot-unsafe-deserialization-remote-code-executi… (Exploit, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-25874?: CVE-2026-25874 is a critical-severity vulnerability in Hugging Face Lerobot, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-23.
How severe is CVE-2026-25874?: Critical severity. CVSS v3 base score is 9.8 out of 10.