MediumFix available
golang-github-moby-sys — security advisory
The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.
- Products
- golang-github-moby-sys
- Affected versions
- 0.0~git20220606.416188a-1, 0.0~git20231105.a4e0878-1, 0.0~git20240807.5447519-1, 0.0~git20240807.5447519-2, 0.0~git20241107.638aa7c-1, 0.0~git20241107.638aa7c-2, 0.0~git20250819.9dc3a90-1, 0.0~git20260904.79376e0-1, 0.0~git20260904.79376e0-2
- Fixed versions
- 0.0~git20260904.79376e0-1
- CVEs
- CVE-2026-61801
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 29 Oct 2026, 07:20 UTC · Revision 1
Source evidence
The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.
osv:DEBIAN-CVE-2026-61801
golang-github-moby-sys
Fixed versions: Not specified
golang-github-moby-sys
Fixed versions: Not specified
golang-github-moby-sys
Fixed versions: 0.0~git20260904.79376e0-1
Complete source record
{
"id": "6e9d6afe33fe317eda5c88fb1072a6943a5cbb08a9ffc6394d511ec17a3ea966",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-61801",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-61801",
"summary": "The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.",
"evidence": "osv:DEBIAN-CVE-2026-61801",
"products": [
{
"name": {
"value": "golang-github-moby-sys",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0~git20220606.416188a-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20231105.a4e0878-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20240807.5447519-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20240807.5447519-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20241107.638aa7c-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20241107.638aa7c-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20250819.9dc3a90-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20260904.79376e0-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.0~git20260904.79376e0-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "golang-github-moby-sys",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.0~git20241107.638aa7c-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20250819.9dc3a90-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20260904.79376e0-1",
"evidence": "/affected/1/versions"
},
{
"value": "0.0~git20260904.79376e0-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "golang-github-moby-sys",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.0~git20260904.79376e0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "0.0~git20241107.638aa7c-2",
"evidence": "/affected/2/versions"
},
{
"value": "0.0~git20250819.9dc3a90-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-61801",
"aliases": [
"DEBIAN-CVE-2026-61801"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-moby-sys",
"purl": "pkg:deb/debian/golang-github-moby-sys?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.0~git20220606.416188a-1",
"0.0~git20231105.a4e0878-1",
"0.0~git20240807.5447519-1",
"0.0~git20240807.5447519-2",
"0.0~git20241107.638aa7c-1",
"0.0~git20241107.638aa7c-2",
"0.0~git20250819.9dc3a90-1",
"0.0~git20260904.79376e0-1",
"0.0~git20260904.79376e0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61801.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-moby-sys",
"purl": "pkg:deb/debian/golang-github-moby-sys?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.0~git20241107.638aa7c-2",
"0.0~git20250819.9dc3a90-1",
"0.0~git20260904.79376e0-1",
"0.0~git20260904.79376e0-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61801.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.0~git20260904.79376e0-1"
}
]
}
],
"package": {
"name": "golang-github-moby-sys",
"purl": "pkg:deb/debian/golang-github-moby-sys?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.0~git20241107.638aa7c-2",
"0.0~git20250819.9dc3a90-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-61801.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-10T11:00:10.238652101Z",
"provider": "osv",
"upstream": [
"CVE-2026-61801"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-61801"
]
},
"related_cves": [
{
"value": "CVE-2026-61801",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 229085,
"published_at": "2026-10-08T17:17:17.433+00:00"
}