ruby-json — security advisory

{
  "id": "6d1957d237cc109f00d9c383865c17616b6aca9b0cc31268f3aeebba1764d4e7",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-54696",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-54696",
    "summary": "Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.",
    "evidence": "osv:DEBIAN-CVE-2026-54696",
    "products": [
      {
        "name": {
          "value": "ruby-json",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.15.2+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.18.1+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.19.1+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.19.2+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.19.4+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.19.9+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.21.1+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.21.2+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.9.1+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.0.2+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.0+dfsg-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ruby-json",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.19.9+dfsg-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "2.15.2+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.18.1+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.19.1+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.19.2+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.19.4+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.9.1+dfsg-1",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "low",
    "structured": {
      "id": "DEBIAN-CVE-2026-54696",
      "aliases": [
        "DEBIAN-CVE-2026-54696"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ruby-json",
            "purl": "pkg:deb/debian/ruby-json?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "2.15.2+dfsg-1",
            "2.18.1+dfsg-1",
            "2.19.1+dfsg-1",
            "2.19.2+dfsg-1",
            "2.19.4+dfsg-1",
            "2.19.9+dfsg-1",
            "2.21.1+dfsg-1",
            "2.21.2+dfsg-1",
            "2.9.1+dfsg-1",
            "3.0.2+dfsg-1",
            "3.1.0+dfsg-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54696.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.19.9+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "ruby-json",
            "purl": "pkg:deb/debian/ruby-json?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "2.15.2+dfsg-1",
            "2.18.1+dfsg-1",
            "2.19.1+dfsg-1",
            "2.19.2+dfsg-1",
            "2.19.4+dfsg-1",
            "2.9.1+dfsg-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54696.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T12:02:58.256919007Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-54696"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-54696"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-54696",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 453023,
  "published_at": "2026-06-30T23:17:28.123+00:00"
}