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DEBIAN-CVE-2026-54592

Type: advisorySource: OSV1 source record

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj::Doc#each_child, when invoked recursively over a deeply nested JSON document, overflows a fixed-size stack buffer and aborts the process, leading to DoS. In a two-step chain in ext/oj/fast.c, doc_each_child increments doc->where past the where_path[MAX_STACK = 100] array with no bounds check and never restores it (the doc->where-- is missing), so calling each_child recursively from inside the yield block drives doc->where beyond the array. On the next entry the function copies the path into the 800-byte stack-local buffer save_path[MAX_STACK] using wlen = doc->where - doc->where_path, so when the previous recursive call left doc->where past where_path[100] the wlen exceeds MAX_STACK and the memcpy overflows save_path on the C stack; because the Oj::Doc parser imposes no JSON nesting-depth limit (relying on a C-stack pressure check), deeply nested attacker input reaches this path. This issue has been fixed in version 3.17.3.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-54592

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-54592

ruby-oj

Source reference: /affected/0/package/name

Affected versions
3.14.2-1

Source reference: /affected/0/versions

Fixed versions
3.14.2-1+deb12u1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

ruby-oj

Source reference: /affected/1/package/name

Affected versions
3.16.3-1

Source reference: /affected/1/versions

Fixed versions
3.16.3-1+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

ruby-oj

Source reference: /affected/2/package/name

Affected versions
3.16.12-1

Source reference: /affected/2/versions

3.16.15-1

Source reference: /affected/2/versions

3.16.16-1

Source reference: /affected/2/versions

3.16.3-1

Source reference: /affected/2/versions

3.17.0-1

Source reference: /affected/2/versions

3.17.1-1

Source reference: /affected/2/versions

Fixed versions
3.17.3-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.14.2-1+deb12u1"
          }
        ]
      }
    ],
    "package": {
      "name": "ruby-oj",
      "purl": "pkg:deb/debian/ruby-oj?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.14.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54592.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.16.3-1+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "ruby-oj",
      "purl": "pkg:deb/debian/ruby-oj?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.16.3-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54592.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.17.3-1"
          }
        ]
      }
    ],
    "package": {
      "name": "ruby-oj",
      "purl": "pkg:deb/debian/ruby-oj?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.16.12-1",
      "3.16.15-1",
      "3.16.16-1",
      "3.16.3-1",
      "3.17.0-1",
      "3.17.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54592.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57835 · Revision 1
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Publisher date
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