dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS

{
  "id": "b5d12eac3a6884b9cd5b02d88d7ae27f3a6c7a518ab94dfcc2daceab26b40bf7",
  "url": "https://osv.dev/vulnerability/CVE-2026-54788",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dd-trace-rs: Unbounded W3C tracestate parsing may lead to DoS",
    "summary": "dd-trace-rs provides Datadog application performance monitoring for Rust. From 0.1.0 until 0.3.3, datadog-opentelemetry/src/propagation/tracecontext.rs parses the W3C tracestate header and collects every semicolon-separated key and value pair in the Datadog dd=... vendor entry into a HashMap without enforcing a pair count or entry size limit. Because tracecontext extraction is enabled by default, a remote unauthenticated attacker can send an arbitrarily large dd=... entry and force excessive CPU and memory consumption for each request, causing denial of service in an instrumented network service. This vulnerability is fixed in 0.3.3.",
    "evidence": "osv:CVE-2026-54788",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54788",
      "aliases": [
        "CVE-2026-54788",
        "GHSA-gpwf-4h98-v82q"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/datadog/dd-trace-rs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "23222698c5c904a85d3faee9779519ae6a9da9d2"
                },
                {
                  "fixed": "7ee480b34b0ae9b0f66ee704d663b6555ec7a823"
                },
                {
                  "fixed": "77c5d185c71d0ea8103da0e6cf4cd50677ffacd2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.1.0"
                      },
                      {
                        "fixed": "0.3.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "77c5d185c71d0ea8103da0e6cf4cd50677ffacd2"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7ee480b34b0ae9b0f66ee704d663b6555ec7a823"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "datadog-opentelemetry-v0.3.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "datadog-opentelemetry-v0.3.2",
            "datadog-opentelemetry-v0.3.1",
            "datadog-opentelemetry-v0.3.0",
            "datadog-opentelemetry-v0.3.0-alpha.1",
            "datadog-opentelemetry-v0.2.1",
            "datadog-opentelemetry-v0.2.0",
            "datadog-opentelemetry-v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54788.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.714270161Z",
      "provider": "osv",
      "references": [
        "https://github.com/DataDog/dd-trace-rs/releases/tag/datadog-opentelemetry-v0.3.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54788.json",
        "https://github.com/DataDog/dd-trace-rs/security/advisories/GHSA-gpwf-4h98-v82q",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54788",
        "https://github.com/DataDog/dd-trace-rs/commit/77c5d185c71d0ea8103da0e6cf4cd50677ffacd2",
        "https://github.com/DataDog/dd-trace-rs/pull/218"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54788.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54788",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517019,
  "published_at": "2026-08-28T16:33:49.032+00:00"
}