CVE-2026-25874

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 v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0011

Probability of exploitation

0.29%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-502 Deserialization of Untrusted Data

Affected Products

Vendor	Product	Versions
huggingface	lerobot	< 0.5.1

References

Advisories & Patches

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

Exploits

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

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-25874? +

CVE-2026-25874 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0011, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-25874? +

CVE-2026-25874 affects products from huggingface, specifically: lerobot. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-25874? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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