CVE-2026-35370: uutils coreutils id Incorrect Access-Control Decisions via Misrepresented Group Membership
The id utility in uutils coreutils miscalculates the groups= section of its output. The implementation uses a user's real GID instead of their effective GID to compute the group list, leading to potentially divergent output compared to GNU coreutils. Because many scripts and automated processes rely on the output of id to make security-critical access-control or permission decisions, this discrepancy can lead to unauthorized access or security misconfigurations.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rust/uu_idto a version that resolves this vulnerability.Fixed in 0.6.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-35370?
CVE-2026-35370 is considered a medium severity vulnerability as it exposes incorrect group membership information.
How do I fix CVE-2026-35370?
To mitigate CVE-2026-35370, ensure you update to the latest version of uutils coreutils where this issue has been addressed.
What does CVE-2026-35370 affect?
CVE-2026-35370 affects the id utility component of uutils coreutils.
What is the impact of CVE-2026-35370 on system security?
The impact of CVE-2026-35370 is that it may allow unauthorized users to infer sensitive information based on incorrect group membership.
Who is vulnerable to CVE-2026-35370?
Any user of uutils coreutils with outdated versions containing this vulnerability may be at risk.