{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.5.34"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "last_affected": "5.0.12"
              },
              {
                "introduced": "5.1.0"
              },
              {
                "last_affected": "5.1.9"
              },
              {
                "introduced": "5.2.0"
              },
              {
                "last_affected": "5.2.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "d3ba8a52ba53b31640e9074e8dc66c7950bdb6d6"
            },
            {
              "introduced": "462f9aa5b2e42ed0e5aced1f1ebc99138a129268"
            },
            {
              "last_affected": "1a15e63ed1e0616714bec0312a32c1d935762bb0"
            },
            {
              "introduced": "83d529e51c7972b5649601c4a86e468da59724e1"
            },
            {
              "last_affected": "688605648a048fd08017e178f1c4478d0f938882"
            },
            {
              "introduced": "23abaa946e0533ae327400852c754ed2cfec2e06"
            },
            {
              "last_affected": "23abaa946e0533ae327400852c754ed2cfec2e06"
            }
          ],
          "repo": "https://github.com/eclipse-vertx/vertx-grpc",
          "type": "GIT"
        }
      ],
      "versions": [
        "5.2.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-4wvq-75mw-q6cg"
  ],
  "database_specific": {
    "cna_assigner": "eclipse",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102477.json"
  },
  "details": "In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size applies to the received bytes. When applied to a compressed message, this only applies to the compressed size and not the actual size of the uncompressed content. This can be used to force a gRPC endpoint to allocate more bytes than the value defined by the configuration, making the endpoint vulnerable to compression bomb attacks.\n\n\n\nThe impacted component is io.vertx:vertx-gprc-server.",
  "id": "CVE-2026-102477",
  "modified": "2026-10-17T02:31:08.787025353Z",
  "published": "2026-10-15T08:28:25.876Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/349"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102477.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eclipse-vertx/vertx-grpc/security/advisories/GHSA-4wvq-75mw-q6cg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102477"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ]
}