# CVE-2026-35380: uutils coreutils has an Improper Input Validation Issue in its cut Utility

Source: https://junglewise.ai/threats/cve-2026-35380-uutils-coreutils-has-an-improper-input-validation-issue-in-its  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-22  
License: CC BY 4.0 with a link back

CVE-2026-35380 · Severity: medium · CVSS 5.5 · Published 2026-04-22

A logic error in the cut utility of uutils coreutils causes the program to incorrectly interpret the literal two-byte string '' (two single quotes) as an empty delimiter. The implementation mistakenly maps this string to the NUL character for both the -d (delimiter) and --output-delimiter options. This vulnerability can lead to silent data corruption or logic errors in automated scripts and data pipelines that process strings containing these characters, as the utility may unintentionally split or join data on NUL bytes rather than the intended literal characters.

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-2026-35380 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35380 being exploited in the wild.

**How severe is CVE-2026-35380?** Medium severity, with a CVSS score of 5.5, 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-2026-35380?** 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-2026-35380?** 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-2026-35380
- GHSA-m2pg-c7m6-77pj

## 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)
- [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)
- [uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition](https://junglewise.ai/threats/cve-2026-35376-uutils-coreutils-has-a-time-of-check-time-of-use-toctou-race)