High
golang-github-go-git-go-billy — security advisory
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.
- Products
- golang-github-go-git-go-billy
- Affected versions
- 5.3.1-2, 5.3.1-3, 5.5.0-1, 5.5.0-2, 5.8.0-1, 5.9.0-1, 5.9.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44973
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:04 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-44973
golang-github-go-git-go-billy
Fixed versions: Not specified
golang-github-go-git-go-billy
Fixed versions: Not specified
golang-github-go-git-go-billy
Fixed versions: Not specified
golang-github-go-git-go-billy
Fixed versions: Not specified
golang-github-go-git-go-billy
Fixed versions: Not specified
Complete source record
{
"id": "cbba16c2bf9539968f2e86a5e9ecd50e57900f6fa738de8db31de999e8a6e8a0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-44973",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-44973",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-44973",
"products": [
{
"name": {
"value": "golang-github-go-git-go-billy",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "5.3.1-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "golang-github-go-git-go-billy",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.1-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "golang-github-go-git-go-billy",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.5.0-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "golang-github-go-git-go-billy",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.5.0-2",
"evidence": "/affected/3/versions"
},
{
"value": "5.8.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.9.1-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "golang-github-go-git-go-billy",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.5.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "5.5.0-2",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-44973",
"aliases": [
"UBUNTU-CVE-2026-44973"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-go-git-go-billy",
"purl": "pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"5.3.1-2",
"5.3.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-go-git-go-billy-dev",
"binary_version": "5.3.1-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "golang-github-go-git-go-billy",
"purl": "pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"5.3.1-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-go-git-go-billy-dev",
"binary_version": "5.3.1-3"
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]
}
},
{
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"package": {
"name": "golang-github-go-git-go-billy",
"purl": "pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"5.5.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"
},
"ecosystem_specific": {
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{
"binary_name": "golang-github-go-git-go-billy-dev",
"binary_version": "5.5.0-1"
}
]
}
},
{
"ranges": [
{
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}
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],
"package": {
"name": "golang-github-go-git-go-billy",
"purl": "pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.5.0-2",
"5.8.0-1",
"5.9.0-1",
"5.9.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-go-git-go-billy-dev",
"binary_version": "5.9.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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],
"package": {
"name": "golang-github-go-git-go-billy",
"purl": "pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.5.0-1",
"5.5.0-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-github-go-git-go-billy-dev",
"binary_version": "5.5.0-2"
}
]
}
}
],
"modified": "2026-10-17T13:00:10.048432568Z",
"provider": "osv",
"upstream": [
"CVE-2026-44973"
],
"references": [
"https://ubuntu.com/security/CVE-2026-44973",
"https://www.cve.org/CVERecord?id=CVE-2026-44973",
"https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2"
]
},
"related_cves": [
{
"value": "CVE-2026-44973",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360380,
"published_at": "2026-05-28T22:16:00+00:00"
}