CVE-2026-35350: Coreutils Uutils Coreutils Doesn't Properly Handle Vulnerability

MODERATE
Advisory Identifier: GHSA-x2wv-9p67-mh9w
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CVSS 6.6
CWE-281
Published
Advisory Summary

CVE-2026-35350 is a MODERATE (CVSS 6.6) uutils coreutils doesn't properly handle vulnerability (CWE-281: Improper Preservation of Permissions) affecting Coreutils libraries in the crates.io ecosystem. The issue involves uutils coreutils doesn't properly handle setuid and setgid bits when ownership preservation fails. Remediation is available in the latest vendor maintenance releases.

CVE-2026-35350 at a Glance

CVE Identifier CVE-2026-35350
GHSA Identifier GHSA-x2wv-9p67-mh9w
Severity MODERATE
CVSS v3.1 Base Score 6.6
CWE Classification CWE-281: Improper Preservation of Permissions
Affected Product Coreutils
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 6.6

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:L/I:H/A:L).

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 Low (C:L)
Integrity High (I:H)
Availability Low (A:L)

How to Fix CVE-2026-35350

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-2026-35350, 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-281: Improper Preservation of Permissions, where the product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended. 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

The cp utility in uutils coreutils fails to properly handle setuid and setgid bits when ownership preservation fails. When copying with the -p (preserve) flag, the utility applies the source mode bits even if the chown operation is unsuccessful. This can result in a user-owned copy retaining original privileged bits, creating unexpected privileged executables that violate local security policies. This differs from GNU cp, which clears these bits when ownership cannot be preserved.

CVE-2026-35350 Affected Coreutils Versions

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

References

NVD — CVE-2026-35350 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35350
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils/issues/9750
Coreutils Source Repository REPOSITORY
https://github.com/uutils/coreutils

Frequently Asked Questions

What is CVE-2026-35350?
CVE-2026-35350 is a security vulnerability in Coreutils involving uutils coreutils doesn't properly handle setuid and setgid bits when ownership preservation fails under CWE-281: Improper Preservation of Permissions.
Which Coreutils versions are affected?
Affected versions include releases prior to current release patches across affected packages: coreutils.
What version fixes CVE-2026-35350?
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-2026-35350?
CVE-2026-35350 has a CVSS v3.1 base score of 6.6 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.
What CWE is associated with CVE-2026-35350?
CVE-2026-35350 is classified under CWE-281: Improper Preservation of Permissions (The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.).
How can I check crates.io dependencies for CVE-2026-35350?
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-x2wv-9p67-mh9w",
  "modified" : "2026-04-29T23:18:25Z",
  "published" : "2026-04-22T18:31:45Z",
  "aliases" : [ "CVE-2026-35350" ],
  "summary" : "uutils coreutils doesn't properly handle setuid and setgid bits when ownership preservation fails",
  "details" : "The cp utility in uutils coreutils fails to properly handle setuid and setgid bits when ownership preservation fails. When copying with the -p (preserve) flag, the utility applies the source mode bits even if the chown operation is unsuccessful. This can result in a user-owned copy retaining original privileged bits, creating unexpected privileged executables that violate local security policies. This differs from GNU cp, which clears these bits when ownership cannot be preserved.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L"
  } ],
  "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-2026-35350"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/issues/9750"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/uutils/coreutils"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-281" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-29T23:18:25Z",
    "nvd_published_at" : "2026-04-22T17:16:37Z"
  }
}