{
  "affected": [
    {
      "database_specific": {
        "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-q63x-9pfm-mjx4/GHSA-q63x-9pfm-mjx4.json"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "feast",
        "purl": "pkg:pypi/feast"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.63.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.0",
        "0.1.0.post0",
        "0.1.2",
        "0.1.2.post0",
        "0.1.2.post1",
        "0.10.0",
        "0.10.1",
        "0.10.1rc1",
        "0.10.1rc3",
        "0.10.2",
        "0.10.3",
        "0.10.4",
        "0.10.5",
        "0.10.6",
        "0.10.7",
        "0.10.8",
        "0.11.0",
        "0.12.0",
        "0.12.1",
        "0.13.0",
        "0.14.0",
        "0.14.1",
        "0.15.0",
        "0.15.1",
        "0.16.0",
        "0.16.1",
        "0.17.0",
        "0.18.0",
        "0.18.1",
        "0.19.0",
        "0.19.1",
        "0.19.2",
        "0.19.3",
        "0.19.4",
        "0.20.0",
        "0.20.1",
        "0.20.2",
        "0.21.0",
        "0.21.1",
        "0.21.2",
        "0.21.3",
        "0.22.0",
        "0.22.1",
        "0.22.2",
        "0.22.3",
        "0.22.4",
        "0.23.0",
        "0.23.1",
        "0.23.2",
        "0.24.0",
        "0.24.1",
        "0.25.0",
        "0.25.1",
        "0.25.2",
        "0.26.0",
        "0.27.0",
        "0.27.1",
        "0.28.0",
        "0.29.0",
        "0.3.0",
        "0.3.2",
        "0.3.3",
        "0.3.3.post0",
        "0.3.4",
        "0.3.5",
        "0.3.6",
        "0.3.7",
        "0.30.2",
        "0.31.0",
        "0.31.1",
        "0.33.1",
        "0.34.0",
        "0.34.1",
        "0.35.0",
        "0.36.0",
        "0.37.1",
        "0.38.0",
        "0.39.0",
        "0.39.1",
        "0.4.0",
        "0.4.1",
        "0.4.1.post0",
        "0.4.2",
        "0.4.3",
        "0.4.4",
        "0.4.5",
        "0.4.6",
        "0.4.7",
        "0.40.0",
        "0.40.1",
        "0.41.3",
        "0.42.0",
        "0.43.0",
        "0.44.0",
        "0.45.0",
        "0.46.0",
        "0.47.0",
        "0.48.0",
        "0.48.1",
        "0.49.0",
        "0.5.0",
        "0.5.0.post0",
        "0.5.0rc0",
        "0.5.1",
        "0.50.0",
        "0.51.0",
        "0.52.0",
        "0.53.0",
        "0.54.0",
        "0.54.1",
        "0.55.0",
        "0.56.0",
        "0.57.0",
        "0.58.0",
        "0.59.0",
        "0.6.0",
        "0.6.1",
        "0.6.2",
        "0.60.0",
        "0.61.0",
        "0.62.0",
        "0.7.0",
        "0.7.0rc1",
        "0.7.0rc2",
        "0.7.0rc3",
        "0.7.1",
        "0.7.2",
        "0.8.0",
        "0.8.0rc3",
        "0.8.1",
        "0.8.2",
        "0.8.3",
        "0.8.4",
        "0.9.0",
        "0.9.0rc1",
        "0.9.0rc2",
        "0.9.1",
        "0.9.2",
        "0.9.3",
        "0.9.4",
        "0.9.5",
        "0.9.5.1",
        "0.9.5.2",
        "0.9.6",
        "0.9.7",
        "0.9.8",
        "0.9.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-56121"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-03T21:20:55Z",
    "nvd_published_at": "2026-06-24T16:16:33Z",
    "severity": "CRITICAL"
  },
  "details": "Feast before 0.63.0 contains an unsafe deserialization vulnerability that allows unauthenticated or unauthorized attackers to achieve remote code execution by sending a crafted gRPC request to the registry server. The user_defined_function.body field of an OnDemandFeatureView spec is decoded from base64 and passed to dill.loads() before any authorization check is performed, enabling attackers to embed a malicious serialized Python object with an arbitrary __reduce__ method to execute OS commands as the feast service account.",
  "id": "GHSA-q63x-9pfm-mjx4",
  "modified": "2026-11-03T21:31:24.697213150Z",
  "published": "2026-06-24T18:32:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56121"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/commit/835cda8e2c1359f1f496ad72701dbd6a73bdb25a"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60520"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-56121"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492229"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/feast-dev/feast"
    },
    {
      "type": "WEB",
      "url": "https://github.com/feast-dev/feast/releases/tag/v0.63.0"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/d64b8111-180b-46ba-afa3-c877fda2ede6"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56121.json"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/feast-unauthenticated-rce-via-applyfeatureview-grpc-deserialization"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Feast vulnerable to unsafe deserialization RCE in registry server via UDF proto"
}