CVE-2026-35343: cut -s (only-delimited) Ignored When Delimiter Vulnerability

LOW
Advisory Identifier: GHSA-wv33-5pxh-r7j7
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CVSS 3.3
CWE-670
Published
Advisory Summary

CVE-2026-35343 is a LOW (CVSS 3.3) -s (only-delimited) ignored when delimiter vulnerability (CWE-670: Always-Incorrect Control Flow Implementation) affecting cut libraries in the crates.io ecosystem. The issue involves -s (only-delimited) ignored when delimiter is a newline. Remediation is available by upgrading affected packages to version 0.7.0.

CVE-2026-35343 at a Glance

CVE Identifier CVE-2026-35343
GHSA Identifier GHSA-wv33-5pxh-r7j7
Severity LOW
CVSS v3.1 Base Score 3.3
CWE Classification CWE-670: Always-Incorrect Control Flow Implementation
Affected Product cut
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 3.3

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:L/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 Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-35343

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

uu_cut fixed: 0.7.0 
Upgrade uu_cut to 0.7.0
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 uu_cut

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-35343, inspect your project dependencies for cut:

inspect dependencies for uu_cut

Analyze the terminal output to locate any version of cut in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.0), 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-670: Always-Incorrect Control Flow Implementation, where the code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated. In cut, 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 cut utility in uutils coreutils incorrectly handles the -s (only-delimited) option when a newline character is specified as the delimiter. The implementation fails to verify the only_delimited flag in the cut_fields_newline_char_delim function, causing the utility to print non-delimited lines that should have been suppressed. This can lead to unexpected data being passed to downstream scripts that rely on strict output filtering. --- _Zellic finding 3.22. Reported in the Zellic *uutils coreutils Program Security Assessment* (for Canonical, Jan 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`._

CVE-2026-35343 Affected cut Versions

1 component(s)
Fixed Versions:
0.7.0
Product / Package Ecosystem Affected Versions Fixed Version
uu_cut
 crates.io
< 0.7.0
0.7.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/uutils/coreutils/security/advisories/GHSA-wv33-5pxh-r7j7
NVD — CVE-2026-35343 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35343
cut Source Repository REPOSITORY
https://github.com/uutils/coreutils/pull/11143
Security Fix Commit FIX COMMIT
https://github.com/uutils/coreutils/commit/9bbb58b746c41802278b0cba738eebbf21517cf7
cut Source Repository REPOSITORY
https://github.com/uutils/coreutils
cut Release RELEASE
https://github.com/uutils/coreutils/releases/tag/0.7.0

Frequently Asked Questions

What is CVE-2026-35343?
CVE-2026-35343 is a security vulnerability in cut involving -s (only-delimited) ignored when delimiter is a newline under CWE-670: Always-Incorrect Control Flow Implementation.
Which cut versions are affected?
Affected versions include releases prior to 0.7.0 across affected packages: uu_cut.
What version fixes CVE-2026-35343?
Upgrading to 0.7.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is uu_cut affected?
Yes, uu_cut is affected in releases prior to 0.7.0. Upgrade your dependency to 0.7.0 or later.
What is the CVSS score of CVE-2026-35343?
CVE-2026-35343 has a CVSS v3.1 base score of 3.3 (LOW) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-35343?
CVE-2026-35343 is classified under CWE-670: Always-Incorrect Control Flow Implementation (The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.).
How can I check crates.io dependencies for CVE-2026-35343?
Run the dependency tree command: 'inspect dependencies for uu_cut'. 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-wv33-5pxh-r7j7",
  "modified" : "2026-07-06T19:54:33Z",
  "published" : "2026-07-06T19:54:33Z",
  "aliases" : [ "CVE-2026-35343" ],
  "summary" : "cut: -s (only-delimited) ignored when delimiter is a newline",
  "details" : "The cut utility in uutils coreutils incorrectly handles the -s (only-delimited) option when a newline character is specified as the delimiter. The implementation fails to verify the only_delimited flag in the cut_fields_newline_char_delim function, causing the utility to print non-delimited lines that should have been suppressed. This can lead to unexpected data being passed to downstream scripts that rely on strict output filtering.\n\n---\n_Zellic finding 3.22. Reported in the Zellic *uutils coreutils Program Security Assessment* (for Canonical, Jan 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`._",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "uu_cut"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.7.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/security/advisories/GHSA-wv33-5pxh-r7j7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35343"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/pull/11143"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/commit/9bbb58b746c41802278b0cba738eebbf21517cf7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/uutils/coreutils"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/uutils/coreutils/releases/tag/0.7.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-670" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-06T19:54:33Z",
    "nvd_published_at" : null
  }
}