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5.5 Medium

CVE-2026-61801 The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and…

Description

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.

Affected products and versions

Product Affected versions Fixed in
sys 0.4 earliest → < 0.4.1 0.4.1

References

Timeline

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