# CVE-2026-35366

> Vulnerability · severity: **MEDIUM** (CVSS 4.4).

## Description

The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences. While POSIX permits arbitrary bytes in environment strings, the uutils implementation silently skips these entries rather than printing the raw bytes. This vulnerability allows malicious environment variables (e.g., adversarial LD_PRELOAD values) to evade inspection by administrators or security auditing tools, potentially allowing library injection or other environment-based attacks to go undetected.

## Key facts

- **CVE ID:** CVE-2026-35366
- **Published:** 2026-04-22
- **CVSS severity:** MEDIUM
- **CVSS base score:** 4.4
- **CWE codes:** CWE-754

## Affected products

- `uutils:coreutils`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35366

## Citation

> AI Analytics. CVE-2026-35366. Retrieved 2026-07-06 from https://api.ai-analytics.org/cve/CVE-2026-35366. Derived from NIST NVD. Licensed CC0.

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