{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.9.3"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d924ffd970626e76a7e48c2b77cd8599f675fd41"
            },
            {
              "fixed": "047aec18efa7d037105e2b72c36dd2ae05e1acc6"
            }
          ],
          "repo": "https://github.com/smallnest/rpcx",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-409"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59803.json"
  },
  "details": "rpcx through 1.9.3, fixed in commit 047aec1, contains a denial-of-service vulnerability in protocol.Message.Decode (protocol/message.go). When a message has the compression flag set, the payload is gzip-decompressed via util.Unzip with no limit on the decompressed output size. The only built-in size guard, protocol.MaxMessageLength, is checked against the compressed on-the-wire frame length, not the decompressed size, so it provides no protection. Because decoding (and decompression) occurs in readRequest before authentication, a single unauthenticated connection can send a small (under 2 MB) gzip-compressed message that expands to gigabytes of heap allocation, leading to out-of-memory conditions and service unavailability.",
  "id": "CVE-2026-59803",
  "modified": "2026-07-15T01:48:51.642207774Z",
  "published": "2026-07-08T19:42:29.448Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59803.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59803"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/rpcx-denial-of-service-via-gzip-decompression-bomb-in-wire-protocol"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/smallnest/rpcx/pull/943"
    },
    {
      "type": "FIX",
      "url": "https://github.com/smallnest/rpcx/commit/047aec18efa7d037105e2b72c36dd2ae05e1acc6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/smallnest/rpcx"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/smallnest/rpcx/issues/942"
    }
  ],
  "schema_version": "1.8.0",
  "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"
    }
  ],
  "summary": "rpcx - Denial of Service via Gzip Decompression Bomb in Wire Protocol"
}