{
  "cveId": "CVE-2026-54500",
  "url": "https://patchblox.com/security/cve/CVE-2026-54500",
  "summary": "CVE-2026-54500 is fixed in ruby-oj on 1 platform, first by DEBIAN-CVE-2026-54500, released July 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "ruby-oj: Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem",
  "description": "Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj.load in :object mode reads uninitialized stack memory (and, for long keys, reads out of bounds) when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller, disclosing process stack memory. In ext/oj/intern.c, form_attr() handles the long-key path by allocating a heap buffer, \u0060b\u0060, populating it with the attribute name, and then freeing it \u2014 but it passed the uninitialized stack buffer buf (not b) to rb_intern3(). rb_intern3 therefore reads len \u002B 1 bytes of uninitialized stack memory. When the key length is \u003E= 256, it also reads out of bounds past the 256-byte buf. The resulting bytes are interned and can reach the caller via the produced Symbol or via the EncodingError message raised on invalid UTF-8, leaking process stack contents. This issue has been fixed in version 3.17.3.",
  "published": "2026-07-01T00:16:32Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
  "epss": 0.00198,
  "epssPercentile": 0.09546,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ruby-oj",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "3.14.2-1\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-54500",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54500",
      "released": "2026-07-03T14:54:39Z"
    },
    {
      "platform": "linux",
      "product": "ruby-oj",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.16.3-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-54500",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54500",
      "released": "2026-07-03T14:54:39Z"
    },
    {
      "platform": "linux",
      "product": "ruby-oj",
      "release": "Debian 14",
      "fixedVersion": "3.17.3-1",
      "fix": "DEBIAN-CVE-2026-54500",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54500",
      "released": "2026-07-03T14:54:39Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}