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FKIE_CVE-2025-40908

Vulnerability from fkie_nvd - Published: 2025-06-01 14:15 - Updated: 2026-06-17 09:22
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified
References
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/ingydotnet/yaml-libyaml-pm/issues/120Exploit, Issue Tracking
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/ingydotnet/yaml-libyaml-pm/pull/121Issue Tracking, Patch
9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://github.com/ingydotnet/yaml-libyaml-pm/pull/122Issue Tracking, Patch
Impacted products
Vendor Product Version
ingydotnet yaml-libyaml *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "YAML-LibYAML",
          "product": "YAML::LibYAML",
          "programFiles": [
            "lib/YAML/XS.pm"
          ],
          "repo": "https://github.com/ingydotnet/yaml-libyaml-pm",
          "vendor": "TINITA",
          "versions": [
            {
              "lessThan": "0.903.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ingydotnet:yaml-libyaml:*:*:*:*:*:perl:*:*",
              "matchCriteriaId": "6F3A4FBC-0D8D-47B0-A8FB-07C0A1294A32",
              "versionEndExcluding": "0.903.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified"
    },
    {
      "lang": "es",
      "value": "YAML-LibYAML anterior a 0.903.0 para Perl usa 2 argumentos abiertos, lo que permite modificar archivos existentes"
    }
  ],
  "id": "CVE-2025-40908",
  "lastModified": "2026-06-17T09:22:16.177",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40908",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-06-02T03:22:02.219115Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-06-01T14:15:21.113",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "url": "https://github.com/ingydotnet/yaml-libyaml-pm/issues/120"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/ingydotnet/yaml-libyaml-pm/pull/121"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/ingydotnet/yaml-libyaml-pm/pull/122"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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