PYSEC-2026-355

Vulnerability from pysec - Published: 2026-06-29 11:50 - Updated: 2026-07-01 20:22
VLAI
Details

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.

Impacted products
Name purl
horovod pkg:pypi/horovod

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "horovod",
        "purl": "pkg:pypi/horovod"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.28.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0",
        "0.10.1",
        "0.10.2",
        "0.11.0",
        "0.11.1",
        "0.11.2",
        "0.11.3",
        "0.12.0",
        "0.12.1",
        "0.13.0",
        "0.13.1",
        "0.13.10",
        "0.13.11",
        "0.13.2",
        "0.13.3",
        "0.13.4",
        "0.13.5",
        "0.13.6",
        "0.13.7",
        "0.13.8",
        "0.14.0",
        "0.14.1",
        "0.15.0",
        "0.15.1",
        "0.15.2",
        "0.16.0",
        "0.16.1",
        "0.16.2",
        "0.16.3",
        "0.16.4",
        "0.18.0",
        "0.18.1",
        "0.18.2",
        "0.19.0",
        "0.19.1",
        "0.19.2",
        "0.19.3",
        "0.19.4",
        "0.19.5",
        "0.20.0",
        "0.20.1",
        "0.20.2",
        "0.20.3",
        "0.21.0",
        "0.21.1",
        "0.21.2",
        "0.21.3",
        "0.22.0",
        "0.22.1",
        "0.23.0",
        "0.24.0",
        "0.24.1",
        "0.24.2",
        "0.24.3",
        "0.25.0",
        "0.26.0",
        "0.26.1",
        "0.27.0",
        "0.28.0",
        "0.28.1",
        "0.9.0",
        "0.9.1",
        "0.9.10",
        "0.9.11",
        "0.9.12",
        "0.9.2",
        "0.9.3",
        "0.9.4",
        "0.9.5",
        "0.9.6",
        "0.9.7",
        "0.9.8",
        "0.9.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-10190",
    "GHSA-mrhh-3ggq-23p2"
  ],
  "details": "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.",
  "id": "PYSEC-2026-355",
  "modified": "2026-07-01T20:22:54.318849Z",
  "published": "2026-06-29T11:50:35.347691Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10190"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/horovod/horovod"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/3e398d1f-70c2-4e05-ae22-f5d66b19a754"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/horovod"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-mrhh-3ggq-23p2"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Horovod Vulnerable to Command Injection"
}


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Sightings

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Nomenclature

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