# CVE-2026-35375: uutils coreutils has an Improper Handling of Unicode Encoding Issue

Source: https://junglewise.ai/threats/cve-2026-35375-uutils-coreutils-has-an-improper-handling-of-unicode-encoding  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-22  
License: CC BY 4.0 with a link back

CVE-2026-35375 · Severity: low · CVSS 3.3 · Published 2026-04-22

A logic error in the split utility of uutils coreutils causes the corruption of output filenames when provided with non-UTF-8 prefix or suffix inputs. The implementation utilizes to_string_lossy() when constructing chunk filenames, which automatically rewrites invalid byte sequences into the UTF-8 replacement character (U+FFFD). This behavior diverges from GNU split, which preserves raw pathname bytes intact. In environments utilizing non-UTF-8 encodings, this vulnerability leads to the creation of files with incorrect names, potentially causing filename collisions, broken automation, or the misdirection of output data.

Technologies: [coreutils (crates.io)](https://junglewise.ai/threats/technologies/crates-io-coreutils), [Uutils Coreutils](https://junglewise.ai/threats/technologies/uutils-coreutils). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io), [Uutils](https://junglewise.ai/threats/vendors/uutils).

## Quick answers

**Is CVE-2026-35375 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35375 being exploited in the wild.

**How severe is CVE-2026-35375?** Low severity, with a CVSS score of 3.3, published 22 April 2026.

**Which products and versions are affected?** coreutils (crates.io) SEMVER:introduced=0,fixed=0.8.0.

**Is there a fix for CVE-2026-35375?** Yes. coreutils (crates.io): upgrade to 0.8.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-35375?** Check whether you run coreutils (crates.io) or Uutils Coreutils at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- coreutils (crates.io): upgrade to 0.8.0 or later

  ```sh
  cargo update -p coreutils
  ```


## Affected products

- coreutils (crates.io) SEMVER:introduced=0,fixed=0.8.0
- Uutils Coreutils

## Identifiers

- CVE-2026-35375
- GHSA-vx9m-xjwf-8cqm

## Related threats

- [uutils coreutils Incorrect Provision of Specified Functionality in cut](https://junglewise.ai/threats/cve-2026-35381-uutils-coreutils-incorrect-provision-of-specified-functionality)
- [uutils coreutils has an Improper Input Validation Issue in its cut Utility](https://junglewise.ai/threats/cve-2026-35380-uutils-coreutils-has-an-improper-input-validation-issue-in-its)
- [A logic error in the tr utility of uutils coreutils causes the program to incorrectly define the [:graph:] and [:print:] character classes.](https://junglewise.ai/threats/cve-2026-35379-uutils-coreutils-has-an-incorrect-provision-of-specified)
- [uutils coreutils has an Incorrect Short Circuit Evaluation Issue](https://junglewise.ai/threats/cve-2026-35378-uutils-coreutils-has-an-incorrect-short-circuit-evaluation-issue)
- [uutils coreutils has an Improper Input Validation Issue in its env Utility](https://junglewise.ai/threats/cve-2026-35377-uutils-coreutils-has-an-improper-input-validation-issue-in-its)