CVE-2026-35370 uutils coreutils id Incorrect Access-Control Decisions via Misrepresented Group Membership
The id utility in uutils coreutils reports incorrect group membership, potentially allowing attackers to bypass access controls in scripts relying on this output.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35370?
CVE-2026-35370 is a medium-severity authentication bypass vulnerability in Uutils coreutils, published on 22 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-35370?
2 open source packages ship an affected version, including uu_id. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
uu_id crates.io | All versions | 0.6.0 |
uu_id crates.io | All versions | 0.6.0 |
Products include Uutils Coreutils.
How do I fix CVE-2026-35370?
Upgrade uu_id to 0.6.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-35370 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35370 exists.
Other vulnerabilities in Uutils coreutils
- CVE-2026-35338 uutils coreutils chmod Path Traversal Bypass of --preserve-root
- CVE-2026-35368 uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection
- CVE-2026-35341 uutils coreutils mkfifo Unauthorized Permission Change on Existing Files
- CVE-2026-35352 uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition
- CVE-2026-35349 uutils coreutils Path-Based Safety Bypass with --preserve-root
Sources
Also known as DEBIAN-CVE-2026-35370, GHSA-47c7-qrm7-mqw7, UBUNTU-CVE-2026-35370.