CVE Catalog

CVE-2026-61801

MediumCVSS 5.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.11%

1th percentile - higher than 1% of all known CVEs

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.

Risk Assessment

An attacker could cause memory exhaustion and process termination, resulting in a denial of service for applications using the vulnerable library.

Recommendation

Update the 'github.com/moby/sys/user' package to version 0.4.1 or later. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS