# CVE-2026-35366: rust-coreutils: The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences

CVE-2026-35366 is fixed in rust-coreutils on 1 platform by DEBIAN-CVE-2026-35366 (version 0.6.0-1), released April 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-35366
- Priority: Routine
- CVSS: 4.4 (medium)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 22, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-coreutils Debian 14 | 0.6.0-1 | [DEBIAN-CVE-2026-35366](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35366.md) | Apr 22, 2026 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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