FKIE_CVE-2026-20639

Vulnerability from fkie_nvd - Published: 2026-03-25 01:17 - Updated: 2026-03-25 21:32
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.
References
product-security@apple.comhttps://support.apple.com/en-us/126348Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/126795Release Notes, Vendor Advisory
product-security@apple.comhttps://support.apple.com/en-us/126796Release Notes, Vendor Advisory
Impacted products
Vendor Product Version
apple macos *
apple macos *
apple macos *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D66288AF-23BD-407A-81F5-F1DFBF84C622",
              "versionEndExcluding": "14.8.5",
              "versionStartIncluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DD21D2C9-BBEC-4E8E-B8D2-C92B7E6155E1",
              "versionEndExcluding": "15.7.5",
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              "vulnerable": true
            },
            {
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              "matchCriteriaId": "0488A377-7971-4703-8823-05BF1E23CF48",
              "versionEndExcluding": "26.3",
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption."
    },
    {
      "lang": "es",
      "value": "Se abord\u00f3 un desbordamiento de entero con una validaci\u00f3n de entrada mejorada. Este problema est\u00e1 solucionado en macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. El procesamiento de una cadena creada con fines maliciosos puede provocar corrupci\u00f3n de la pila."
    }
  ],
  "id": "CVE-2026-20639",
  "lastModified": "2026-03-25T21:32:57.330",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-25T01:17:04.443",
  "references": [
    {
      "source": "product-security@apple.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/126348"
    },
    {
      "source": "product-security@apple.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://support.apple.com/en-us/126795"
    },
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      "source": "product-security@apple.com",
      "tags": [
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        "Vendor Advisory"
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      "url": "https://support.apple.com/en-us/126796"
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  "sourceIdentifier": "product-security@apple.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Detection rules are retrieved from Rulezet.