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DEBIAN-CVE-2026-20777

Type: advisorySource: OSV1 source record

A heap-based buffer overflow vulnerability exists in the Nicolet WFT parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted .wft file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-20777

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-2026-20777

biosig

Source reference: /affected/0/package/name

Affected versions
2.5.0-1

Source reference: /affected/0/versions

2.5.2-1

Source reference: /affected/0/versions

2.5.2-2

Source reference: /affected/0/versions

2.6.0-1

Source reference: /affected/0/versions

2.6.1-1

Source reference: /affected/0/versions

3.9.0-1

Source reference: /affected/0/versions

3.9.5-1

Source reference: /affected/0/versions

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

biosig

Source reference: /affected/1/package/name

Affected versions
3.9.0-1

Source reference: /affected/1/versions

3.9.5-1

Source reference: /affected/1/versions

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

biosig

Source reference: /affected/2/package/name

Affected versions
3.9.0-1

Source reference: /affected/2/versions

Fixed versions
3.9.5-1

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": "biosig",
      "purl": "pkg:deb/debian/biosig?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.5.0-1",
      "2.5.2-1",
      "2.5.2-2",
      "2.6.0-1",
      "2.6.1-1",
      "3.9.0-1",
      "3.9.5-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-20777.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "biosig",
      "purl": "pkg:deb/debian/biosig?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.9.0-1",
      "3.9.5-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-20777.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.9.5-1"
          }
        ]
      }
    ],
    "package": {
      "name": "biosig",
      "purl": "pkg:deb/debian/biosig?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.9.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-20777.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56212 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-20777 · Revision 1Source updated