FKIE_CVE-2026-33320

Vulnerability from fkie_nvd - Published: 2026-03-24 01:17 - Updated: 2026-03-25 16:08
Severity
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Dasel is a command-line tool and library for querying, modifying, and transforming data structures. Starting in version 3.0.0 and prior to version 3.3.1, Dasel's YAML reader allows an attacker who can supply YAML for processing to trigger extreme CPU and memory consumption. The issue is in the library's own `UnmarshalYAML` implementation, which manually resolves alias nodes by recursively following `yaml.Node.Alias` pointers without any expansion budget, bypassing go-yaml v4's built-in alias expansion limit. Version 3.3.2 contains a patch for the issue.
References
security-advisories@github.comhttps://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
tomwright dasel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tomwright:dasel:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "E08D6137-BA75-4A33-9DAF-F28A5FCEF5DC",
              "versionEndExcluding": "3.3.2",
              "versionStartIncluding": "3.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Dasel is a command-line tool and library for querying, modifying, and transforming data structures. Starting in version 3.0.0 and prior to version 3.3.1, Dasel\u0027s YAML reader allows an attacker who can supply YAML for processing to trigger extreme CPU and memory consumption. The issue is in the library\u0027s own `UnmarshalYAML` implementation, which manually resolves alias nodes by recursively following `yaml.Node.Alias` pointers without any expansion budget, bypassing go-yaml v4\u0027s built-in alias expansion limit. Version 3.3.2 contains a patch for the issue."
    },
    {
      "lang": "es",
      "value": "Dasel es una herramienta de l\u00ednea de comandos y biblioteca para consultar, modificar y transformar estructuras de datos. A partir de la versi\u00f3n 3.0.0 y antes de la versi\u00f3n 3.3.1, el lector YAML de Dasel permite a un atacante que puede proporcionar YAML para su procesamiento desencadenar un consumo extremo de CPU y memoria. El problema reside en la propia implementaci\u00f3n `UnmarshalYAML` de la biblioteca, que resuelve manualmente los nodos alias siguiendo recursivamente los punteros `yaml.Node.Alias` sin ning\u00fan presupuesto de expansi\u00f3n, eludiendo el l\u00edmite de expansi\u00f3n de alias incorporado de go-yaml v4. La versi\u00f3n 3.3.2 contiene un parche para el problema."
    }
  ],
  "id": "CVE-2026-33320",
  "lastModified": "2026-03-25T16:08:49.057",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-24T01:17:02.203",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/TomWright/dasel/security/advisories/GHSA-4fcp-jxh7-23x8"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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