Vulnerability · Published Apr 23, 2026 · Assigned by VulnCheck

CVE-2026-25874LeRobot Unsafe Deserialization Remote Code Execution via gRPC

Critical 9.3

In plain English

A critical-severity unsafe deserialization in LeRobot from Hugging Face. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 15.5% (higher than 97% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)15.5%top 3.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Hugging Face	LeRobot	0 – through 0.5.1

Weakness: CWE-502 · 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

References

https://chocapikk.com/posts/2026/lerobot-pickle-rce/ exploit
https://github.com/huggingface/lerobot/issues/3047 issue-tracking
https://github.com/huggingface/lerobot/pull/3048 issue-tracking
https://github.com/huggingface/lerobot/issues/3134 issue-tracking
https://www.vulncheck.com/advisories/lerobot-unsafe-deserialization-remote-code-execution-via-grpc third-party-advisory