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

> An unauthenticated attacker can achieve arbitrary code execution on LeRobot servers or clients by sending crafted pickle payloads via gRPC.

- **Severity:** Critical 9.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-f7vj-73pm-m822

## What is CVE-2026-25874?

CVE-2026-25874 is a critical unsafe deserialization vulnerability in Hugging Face LeRobot, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-25874?

It affects 1 product.


Products: Huggingface Lerobot.

## How do I fix CVE-2026-25874?

No fix has been published for CVE-2026-25874 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25874 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25874 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25874 and fix it if it is affected.

What it is: CVE-2026-25874 is a critical unsafe deserialization vulnerability in Hugging Face LeRobot, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25874 exists.

Affected product: Hugging Face LeRobot. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-25874/ (Markdown: https://insights.sbomify.com/CVE-2026-25874/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25874
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25874
- OSV: https://osv.dev/vulnerability/CVE-2026-25874

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25874/
Summaries are generated and may contain mistakes; the official description above is the record.