CVE-2026-35380: Coreutils Uutils Coreutils Has An Improper Vulnerability

MODERATE
Advisory Identifier: GHSA-m2pg-c7m6-77pj
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CVSS 5.5
CWE-20
Published
Advisory Summary

CVE-2026-35380 is a MODERATE (CVSS 5.5) uutils coreutils has an improper vulnerability (CWE-20: Improper Input Validation) affecting Coreutils libraries in the crates.io ecosystem. The issue involves uutils coreutils has an improper input validation issue in its cut utility. Remediation is available by upgrading affected packages to version 0.8.0.

CVE-2026-35380 at a Glance

CVE Identifier CVE-2026-35380
GHSA Identifier GHSA-m2pg-c7m6-77pj
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Coreutils
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-35380

To remediate this vulnerability, upgrade all affected Coreutils dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

coreutils fixed: 0.8.0 
Upgrade coreutils to 0.8.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for coreutils

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-35380, inspect your project dependencies for Coreutils:

inspect dependencies for coreutils

Analyze the terminal output to locate any version of Coreutils in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.8.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Coreutils, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-35380 Affected Coreutils Versions

1 component(s)
Fixed Versions:
0.8.0
Product / Package Ecosystem Affected Versions Fixed Version
coreutils
 crates.io
< 0.8.0
0.8.0

References

NVD — CVE-2026-35380 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35380
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils/pull/11399
Security Fix Commit FIX COMMIT
https://github.com/uutils/coreutils/commit/593f5b191e8b9c87e4292955999c2d0b5cbcce69
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils
Coreutils Release RELEASE
https://github.com/uutils/coreutils/releases/tag/0.8.0

Frequently Asked Questions

What is CVE-2026-35380?
CVE-2026-35380 is a security vulnerability in Coreutils involving uutils coreutils has an Improper Input Validation Issue in its cut Utility under CWE-20: Improper Input Validation.
Which Coreutils versions are affected?
Affected versions include releases prior to 0.8.0 across affected packages: coreutils.
What version fixes CVE-2026-35380?
Upgrading to 0.8.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is coreutils affected?
Yes, coreutils is affected in releases prior to 0.8.0. Upgrade your dependency to 0.8.0 or later.
What is the CVSS score of CVE-2026-35380?
CVE-2026-35380 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-35380?
CVE-2026-35380 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check crates.io dependencies for CVE-2026-35380?
Run the dependency tree command: 'inspect dependencies for coreutils'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m2pg-c7m6-77pj",
  "modified" : "2026-04-30T18:06:30Z",
  "published" : "2026-04-22T18:31:46Z",
  "aliases" : [ "CVE-2026-35380" ],
  "summary" : "uutils coreutils has an Improper Input Validation Issue in its cut Utility",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "coreutils"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.8.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35380"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/pull/11399"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/commit/593f5b191e8b9c87e4292955999c2d0b5cbcce69"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/uutils/coreutils"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/releases/tag/0.8.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-30T18:06:30Z",
    "nvd_published_at" : "2026-04-22T17:16:43Z"
  }
}