CVE-2026-35370

Summary

id: groups= computed from real GID instead of effective GID

Severity

medium

CVSS

4.4

EPSS

0.1% (p1)

CWE

CWE-273, CWE-863

Also known as

GHSA-47c7-qrm7-mqw7, GHSA-q94g-3gcf-66x7

Published

2026-07-06

Updated

2026-07-06

Advisory details

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.

Zellic finding 3.72. Reported in the Zellic uutils coreutils Program Security Assessment (for Canonical, Jan 2026), audited commit 3a07ffc5a9bd4c283e75afa548ba1f1957bad242.

References

• https://github.com/advisories/GHSA-47c7-qrm7-mqw7
• https://github.com/uutils/coreutils/security/advisories/GHSA-47c7-qrm7-mqw7
• https://nvd.nist.gov/vuln/detail/CVE-2026-35370
• https://github.com/uutils/coreutils/issues/10006

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• CVE-2026-53512 — critical · npm/better-auth
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