GHSA-mjcv-p78q-w5fw

Source

https://github.com/advisories/GHSA-mjcv-p78q-w5fw

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mjcv-p78q-w5fw/GHSA-mjcv-p78q-w5fw.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mjcv-p78q-w5fw

Aliases

CVE-2026-61801

Published

2026-10-08T16:08:33Z

Modified

2026-10-08T16:15:05Z

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

A denial-of-service (DoS) vulnerability exists in github.com/moby/sys/user before v0.4.1 when parsing specially crafted user or group database files. An attacker able to supply a malicious /etc/passwd or /etc/group-style file may cause excessive memory consumption, potentially resulting in process termination due to Out Of Memory (OOM) conditions.

This issue is related to containerd [CVE-2026-47262] / GHSA-jpcc-p29g-p8mq, which describes one practical exploitation path through processing untrusted container image content. Applications using github.com/moby/sys/user to parse untrusted user or group database files may be similarly affected.

Impact

github.com/moby/sys/user versions before v0.4.1 do not place sufficient limits on entries while parsing user and group database files. A specially crafted file may cause excessive memory consumption, potentially leading to process termination due to Out Of Memory (OOM) conditions.

Applications that use github.com/moby/sys/user to parse user-supplied or otherwise untrusted /etc/passwd or /etc/group files may be affected. The severity depends on whether an attacker can influence the contents of files being parsed.

Patches

This issue is fixed in github.com/moby/sys/user v0.4.1. Users should upgrade to v0.4.1 or later.

Workarounds

Avoid parsing attacker-controlled /etc/passwd or /etc/group-style files with affected versions of github.com/moby/sys/user.

Applications that must process untrusted user or group database files should validate and limit accepted input before parsing. Upgrading to v0.4.1 or later is the recommended remediation.

References

containerd CVE-2026-47262 / GHSA-jpcc-p29g-p8mq: https://github.com/containerd/containerd/security/advisories/GHSA-jpcc-p29g-p8mq
Fix in github.com/moby/sys/user: https://github.com/moby/sys/user/commit/210d32ba2bcb4544ee968c7f31249fe59796e60b

Database specific

{
    "cwe_ids": [
        "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T16:08:33Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
}

References

Affected packages

Go / github.com/moby/sys/user

Package

Name: github.com/moby/sys/user; View open source insights on deps.dev
Purl: pkg:golang/github.com/moby/sys/user

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.4.1

Database specific

last_known_affected_version_range

"<= 0.4.0"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mjcv-p78q-w5fw/GHSA-mjcv-p78q-w5fw.json"