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UBUNTU-CVE-2026-54451

Type: advisorySource: OSV1 source record

Elixir protobuf is a pure Elixir implementation of Google Protobuf. From 0.8.0 until 0.16.1, services that decode attacker-controlled protobuf bytes with Protobuf.Decoder can be taken offline when the schema contains a self-referential or cyclic message type. In lib/protobuf/decoder.ex, Protobuf.Decoder.value_for_field/3 handles an embedded?: true field by recursively entering the decode / build_message / handle_value / value_for_field call chain without enforcing a nesting-depth limit. Deeply nested embedded fields retain non-tail recursive frames, allowing a comparatively small request to consume substantial CPU and memory, pin a BEAM scheduler, and exhaust the node. This issue is fixed in version 0.16.1.

Announced Group revision 1
Original source ↗

UBUNTU-CVE-2026-54451

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:UBUNTU-CVE-2026-54451

elixir

Source reference: /affected/0/package/name

Affected versions
0.7.1-1

Source reference: /affected/0/versions

0.7.1-2

Source reference: /affected/0/versions

0.7.1-4build0.14.04.1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

elixir

Source reference: /affected/1/package/name

Affected versions
0.7.1-3

Source reference: /affected/1/versions

0.7.1-4build0.16.04.1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

elixir

Source reference: /affected/2/package/name

Affected versions
0.7.1-4build1

Source reference: /affected/2/versions

Fixed versions
Not stated in this record
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"
          }
        ]
      }
    ],
    "package": {
      "name": "elixir",
      "purl": "pkg:deb/ubuntu/elixir?arch=source&distro=trusty",
      "ecosystem": "Ubuntu:14.04:LTS"
    },
    "versions": [
      "0.7.1-1",
      "0.7.1-2",
      "0.7.1-4build0.14.04.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54451.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "python-elixir",
          "binary_version": "0.7.1-4build0.14.04.1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "elixir",
      "purl": "pkg:deb/ubuntu/elixir?arch=source&distro=xenial",
      "ecosystem": "Ubuntu:16.04:LTS"
    },
    "versions": [
      "0.7.1-3",
      "0.7.1-4build0.16.04.1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54451.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "python-elixir",
          "binary_version": "0.7.1-4build0.16.04.1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "elixir",
      "purl": "pkg:deb/ubuntu/elixir?arch=source&distro=bionic",
      "ecosystem": "Ubuntu:18.04:LTS"
    },
    "versions": [
      "0.7.1-4build1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54451.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "python-elixir",
          "binary_version": "0.7.1-4build1"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#5788 · Revision 1
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Publisher date
Read the original announcement

Revision history

  1. UBUNTU-CVE-2026-54451 · Revision 1Source updated