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DEBIAN-CVE-2026-2739

Type: advisorySource: OSV1 source record

This affects versions of the package bn.js before 5.2.3. Calling maskn(0) on any BN instance corrupts the internal state, causing toString(), divmod(), and other methods to enter an infinite loop, hanging the process indefinitely.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-2739

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-2026-2739

node-bn.js

Source reference: /affected/0/package/name

Affected versions
5.2.1+~5.1.1-1

Source reference: /affected/0/versions

5.2.3+~5.2.0-1

Source reference: /affected/0/versions

5.2.5+~5.2.0-1

Source reference: /affected/0/versions

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

node-bn.js

Source reference: /affected/1/package/name

Affected versions
5.2.1+~5.1.1-1

Source reference: /affected/1/versions

5.2.3+~5.2.0-1

Source reference: /affected/1/versions

5.2.5+~5.2.0-1

Source reference: /affected/1/versions

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

node-bn.js

Source reference: /affected/2/package/name

Affected versions
5.2.1+~5.1.1-1

Source reference: /affected/2/versions

Fixed versions
5.2.3+~5.2.0-1

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"
          }
        ]
      }
    ],
    "package": {
      "name": "node-bn.js",
      "purl": "pkg:deb/debian/node-bn.js?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "5.2.1+~5.1.1-1",
      "5.2.3+~5.2.0-1",
      "5.2.5+~5.2.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2739.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-bn.js",
      "purl": "pkg:deb/debian/node-bn.js?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "5.2.1+~5.1.1-1",
      "5.2.3+~5.2.0-1",
      "5.2.5+~5.2.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2739.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "5.2.3+~5.2.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "node-bn.js",
      "purl": "pkg:deb/debian/node-bn.js?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "5.2.1+~5.1.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2739.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56308 · Revision 1
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Publisher date
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