UnratedFix available

DEBIAN-CVE-2026-44973

Type: advisorySource: OSV1 source record

Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0.

Announced 28 May 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-44973

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-2026-44973

golang-github-go-git-go-billy

Source reference: /affected/0/package/name

Affected versions: 5.3.1-3
Source reference: /affected/0/versions
5.5.0-1
Source reference: /affected/0/versions
5.5.0-2
Source reference: /affected/0/versions
5.8.0-1
Source reference: /affected/0/versions
5.9.0-1
Source reference: /affected/0/versions
5.9.1-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

golang-github-go-git-go-billy

Source reference: /affected/1/package/name

Affected versions: 5.5.0-1
Source reference: /affected/1/versions
5.5.0-2
Source reference: /affected/1/versions
5.8.0-1
Source reference: /affected/1/versions
5.9.0-1
Source reference: /affected/1/versions
5.9.1-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

golang-github-go-git-go-billy

Source reference: /affected/2/package/name

Affected versions: 5.5.0-1
Source reference: /affected/2/versions
5.5.0-2
Source reference: /affected/2/versions
5.8.0-1
Source reference: /affected/2/versions
Fixed versions: 5.9.0-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

golang-github-go-git-go-billy-v6

Source reference: /affected/3/package/name

Affected versions: 6~git20260226.45bd095-1
Source reference: /affected/3/versions
6~git20260226.45bd095-2
Source reference: /affected/3/versions
Fixed versions: 6.0.0~alpha.1-1
Source reference: /affected/3/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": "golang-github-go-git-go-billy",
      "purl": "pkg:deb/debian/golang-github-go-git-go-billy?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "5.3.1-3",
      "5.5.0-1",
      "5.5.0-2",
      "5.8.0-1",
      "5.9.0-1",
      "5.9.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "golang-github-go-git-go-billy",
      "purl": "pkg:deb/debian/golang-github-go-git-go-billy?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "5.5.0-1",
      "5.5.0-2",
      "5.8.0-1",
      "5.9.0-1",
      "5.9.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "5.9.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "golang-github-go-git-go-billy",
      "purl": "pkg:deb/debian/golang-github-go-git-go-billy?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "5.5.0-1",
      "5.5.0-2",
      "5.8.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "6.0.0~alpha.1-1"
          }
        ]
      }
    ],
    "package": {
      "name": "golang-github-go-git-go-billy-v6",
      "purl": "pkg:deb/debian/golang-github-go-git-go-billy-v6?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "6~git20260226.45bd095-1",
      "6~git20260226.45bd095-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57135 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:01:55 GMT
Publisher date: Thu, 28 May 2026 22:16:59 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-44973 · Revision 1Source updated