{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": "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",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "postgres_protocol::authentication::sasl::ScramSha256::update"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "postgres-protocol",
        "purl": "pkg:cargo/postgres-protocol"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.0"
            },
            {
              "fixed": "0.6.12"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "A malicious, compromised, or man-in-the-middle server can supply an arbitrarily\nlarge SCRAM-SHA-256 PBKDF2 iteration count during authentication. The client\nruns it inline with no upper bound, pinning a `tokio` worker thread for minutes\nper connection, possibly stalling the whole async runtime.\n\nApplications that connect only to a trusted database are not exposed; the risk\napplies to clients that may connect to untrusted or user-supplied servers, or\nwhose connection can be intercepted by a man-in-the-middle.",
  "id": "RUSTSEC-2026-0179",
  "modified": "2026-06-12T17:27:58Z",
  "published": "2026-06-12T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/postgres-protocol"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0179.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-postgres/rust-postgres/commit/d40097a36a85068ea50a3afbf0ce154ba439e7f0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq"
    }
  ],
  "related": [],
  "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": "Unbounded SCRAM iteration count allows a malicious server to cause CPU-exhaustion denial of service"
}