2026-07-27 20:14CVE-2026-64691apple
PUBLISHED5.2

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

Problem type

  • An app may be able to cause unexpected system termination

Affected products

Apple

macOS

< 26.6 - AFFECTED

References

GitHub Security Advisories

GHSA-jw76-wr94-p2rj

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe...

https://github.com/advisories/GHSA-jw76-wr94-p2rj

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

From Hacker News

One CVE even lists the same person twice!

CVE-2026-64691: Ruslan Dautov, Ruslan Dautov

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-64691
Click to expand
{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-64691",
    "assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
    "assignerShortName": "apple",
    "dateUpdated": "2026-07-27T20:14:52.091Z",
    "dateReserved": "2026-07-20T18:09:01.158Z",
    "datePublished": "2026-07-27T20:14:52.091Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
        "shortName": "apple",
        "dateUpdated": "2026-07-27T20:14:52.091Z"
      },
      "descriptions": [
        {
          "lang": "en",
          "value": "A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination."
        }
      ],
      "affected": [
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "26.6"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "An app may be able to cause unexpected system termination"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://support.apple.com/en-us/128067"
        }
      ]
    }
  }
}