kaml has potential denial of service while parsing input with anchors and aliases

{
  "id": "f4d530e1d594f37bb997f36ffef7c2e700ad9a91d72734b006ff94b9d4a239ff",
  "url": "https://osv.dev/vulnerability/CVE-2023-28118",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "kaml has potential denial of service while parsing input with anchors and aliases",
    "summary": "kaml provides YAML support for kotlinx.serialization. Prior to version 0.53.0, applications that use kaml to parse untrusted input containing anchors and aliases may consume excessive memory and crash. Version 0.53.0 and later default to refusing to parse YAML documents containing anchors and aliases. There are no known workarounds.",
    "evidence": "osv:CVE-2023-28118",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-28118",
      "aliases": [
        "CVE-2023-28118",
        "GHSA-c24f-2j3g-rg48"
      ],
      "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/charleskorn/kaml",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5f82a2d7e00bfc307afca05d1dc4d7c50593531a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.53.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5f82a2d7e00bfc307afca05d1dc4d7c50593531a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5f82a2d7e00bfc307afca05d1dc4d7c50593531a"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.53.0"
                  },
                  {
                    "cpe": "cpe:2.3:a:kaml_project:kaml:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.53.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.52.0",
            "0.51.0",
            "0.50.0",
            "0.49.0",
            "0.48.0",
            "0.47.0",
            "0.46.0",
            "0.45.0",
            "0.44.0",
            "0.43.0",
            "0.42.0",
            "0.41.0",
            "0.40.0",
            "0.39.1",
            "0.39.0",
            "0.38.0",
            "0.37.0",
            "0.36.0",
            "0.35.3",
            "0.35.2",
            "0.35.1",
            "0.35.0",
            "0.34.0",
            "0.33.0",
            "0.32.0",
            "0.31.0",
            "0.30.0",
            "0.29.0",
            "0.28.3",
            "0.28.2",
            "0.28.1",
            "0.28.0",
            "0.27.0",
            "0.26.0",
            "0.25.0",
            "0.24.0",
            "0.23.0",
            "0.22.0",
            "0.21.0",
            "0.20.0",
            "0.19.0",
            "0.18.1",
            "0.18.0",
            "0.17.0",
            "0.16.1",
            "0.16.0",
            "0.15.0",
            "0.14.0",
            "0.13.0",
            "0.12.0",
            "0.11.0",
            "0.10.0",
            "0.9.0",
            "0.8.0",
            "0.7.0",
            "0.6.0",
            "0.5.0",
            "0.4.0",
            "0.3.0",
            "0.2.1",
            "0.2.0",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28118.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.419568020Z",
      "provider": "osv",
      "references": [
        "https://github.com/charleskorn/kaml/releases/tag/0.53.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28118.json",
        "https://github.com/charleskorn/kaml/security/advisories/GHSA-c24f-2j3g-rg48",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-28118",
        "https://github.com/charleskorn/kaml/commit/5f82a2d7e00bfc307afca05d1dc4d7c50593531a"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-776"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28118.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-28118",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517863,
  "published_at": "2023-03-20T12:39:42.075+00:00"
}