# CVE-2024-10190: Unauthenticated Remote Code Execution in ElasticRendezvousHandler in horovod/horovod

> Unauthenticated attackers can execute arbitrary code on Horovod servers by sending malicious pickle objects via the ElasticRendezvousHandler.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Mar 2025
- **Updated:** 15 Oct 2025
- **Also known as:** GHSA-mrhh-3ggq-23p2, PYSEC-2026-355

## What is CVE-2024-10190?

CVE-2024-10190 is a critical unsafe deserialization vulnerability in horovod/horovod, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Horovod versions up to and including v0.28.1 are vulnerable to unauthenticated remote code execution. The vulnerability is due to improper handling of base64-encoded data in the `ElasticRendezvousHandler`, a subclass of `KVStoreHandler`. Specifically, the `_put_value` method in `ElasticRendezvousHandler` calls `codec.loads_base64(value)`, which eventually invokes `cloudpickle.loads(decoded)`. This allows an attacker to send a malicious pickle object via a PUT request, leading to arbitrary code execution on the server.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2024-10190?

3 open source packages ship an affected version, including horovod. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `horovod` | PyPI | All versions to 0.28.1 | None |
| `horovod` | PyPI | All versions to 0.28.1 | None |
| `horovod` | PyPI | All versions to 0.28.1 | None |

Products: Horovod Horovod.

## How do I fix CVE-2024-10190?

No fix has been published for CVE-2024-10190 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-10190 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-10190 exists.

## Other vulnerabilities in horovod/horovod

- [CVE-2022-0315](https://insights.sbomify.com/CVE-2022-0315/): Insecure Temporary File in horovod/horovod (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-10190 and fix it if it is affected.

What it is: CVE-2024-10190 is a critical unsafe deserialization vulnerability in horovod/horovod, published on 20 Mar 2025. 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-2024-10190 exists.

Affected packages and fixed versions:
- horovod (PyPI): affected all versions up to 0.28.1; no fix listed
- horovod (PyPI): affected all versions up to 0.28.1; no fix listed
- horovod (PyPI): affected all versions up to 0.28.1; no fix listed

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-2024-10190/ (Markdown: https://insights.sbomify.com/CVE-2024-10190/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-10190
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-10190
- OSV: https://osv.dev/vulnerability/CVE-2024-10190

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-10190/
Summaries are generated and may contain mistakes; the official description above is the record.