CVE-2026-35359: Coreutils Uutils Coreutils Has A Link Vulnerability

MODERATE
Advisory Identifier: GHSA-hpfw-mqm3-33jh
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CVSS 4.7
CWE-59
Published
Advisory Summary

CVE-2026-35359 is a MODERATE (CVSS 4.7) uutils coreutils has a link vulnerability (CWE-59: Improper Link Resolution Before File Access ('Link Following')) affecting Coreutils libraries in the crates.io ecosystem. The issue involves uutils coreutils has a link following issue. Remediation is available in the latest vendor maintenance releases.

CVE-2026-35359 at a Glance

CVE Identifier CVE-2026-35359
GHSA Identifier GHSA-hpfw-mqm3-33jh
Severity MODERATE
CVSS v3.1 Base Score 4.7
CWE Classification CWE-59: Improper Link Resolution Before File Access ('Link Following')
Affected Product Coreutils
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 4.7

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

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

How to Fix CVE-2026-35359

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: Latest secure release 
Upgrade coreutils to Latest secure release
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-2026-35359, 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 the patched release), 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-59: Improper Link Resolution Before File Access ('Link Following'), where the product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. 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 Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.

CVE-2026-35359 Affected Coreutils Versions

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

References

NVD — CVE-2026-35359 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35359
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils/issues/10017
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils

Frequently Asked Questions

What is CVE-2026-35359?
CVE-2026-35359 is a security vulnerability in Coreutils involving uutils coreutils has a Link Following issue under CWE-59: Improper Link Resolution Before File Access ('Link Following').
Which Coreutils versions are affected?
Affected versions include releases prior to current release patches across affected packages: coreutils.
What version fixes CVE-2026-35359?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is coreutils affected?
Yes, coreutils is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-35359?
CVE-2026-35359 has a CVSS v3.1 base score of 4.7 (MODERATE) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-35359?
CVE-2026-35359 is classified under CWE-59: Improper Link Resolution Before File Access ('Link Following') (The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.).
How can I check crates.io dependencies for CVE-2026-35359?
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-hpfw-mqm3-33jh",
  "modified" : "2026-04-30T17:14:47Z",
  "published" : "2026-04-22T18:31:45Z",
  "aliases" : [ "CVE-2026-35359" ],
  "summary" : "uutils coreutils has a Link Following issue",
  "details" : "A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "coreutils"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.8.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35359"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/issues/10017"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/uutils/coreutils"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-59" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-30T17:14:47Z",
    "nvd_published_at" : "2026-04-22T17:16:38Z"
  }
}