CVE-2026-61801

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Source
https://cve.org/CVERecord?id=CVE-2026-61801
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-61801.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-61801
Aliases
Downstream
AZL (18)
BELL (1)
CGA (292)
CLEANSTART (2)
DEBIAN (1)
ECHO (1)
MINI (131)
openSUSE (1)
RHSA (3)
UBUNTU (1)
Related
Published
2026-10-08T16:22:25Z
Modified
2026-10-19T21:40:56Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
github.com/moby/sys/user has a possible DoS via unbounded parsing of user and group database files
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61801.json"
}
References

Affected packages

Git / github.com/moby/sys

Affected ranges

Type
GIT
Repo
https://github.com/moby/sys
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.4.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "85a71bbe1faa36c552a960e6a5f3d0cfb632fbbe"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.4.1"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

atomicwriter/v0.*
atomicwriter/v0.1.0
capability/v0.*
capability/v0.2.0
capability/v0.3.0
capability/v0.4.0
devices/v0.*
devices/v0.1.0
mount/v0.*
mount/v0.1.0
mount/v0.1.1
mount/v0.2.0
mount/v0.3.0
mount/v0.3.1
mount/v0.3.2
mount/v0.3.3
mount/v0.3.4
mount/v0.3.5
mountinfo/v0.*
mountinfo/v0.1.0
mountinfo/v0.1.2
mountinfo/v0.1.3
mountinfo/v0.2.0
mountinfo/v0.3.0
mountinfo/v0.3.1
mountinfo/v0.4.0
mountinfo/v0.4.1
mountinfo/v0.5.0
mountinfo/v0.6.0
mountinfo/v0.6.1
mountinfo/v0.6.2
mountinfo/v0.7.0
mountinfo/v0.7.1
mountinfo/v0.7.2
reexec/v0.*
reexec/v0.1.0
sequential/v0.*
sequential/v0.5.0
sequential/v0.6.0
sequential/v0.7.0
signal/v0.*
signal/v0.5.0
signal/v0.6.0
signal/v0.7.0
signal/v0.7.1
symlink/v0.*
symlink/v0.1.0
symlink/v0.2.0
symlink/v0.3.0
user/v0.*
user/v0.1.0
user/v0.2.0
user/v0.3.0
user/v0.4.0
userns/v0.*
userns/v0.1.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-61801.json"