Vulnerability-Lookup

UBUNTU-CVE-2026-35377 (CVE-2026-35377)

Vulnerability from osv_ubuntu – Published: 2026-04-22 17:16 – Updated: 2026-09-21 18:36 – Source website

Details

A logic error in the env utility of uutils coreutils causes a failure to correctly parse command-line arguments when utilizing the -S (split-string) option. In GNU env, backslashes within single quotes are treated literally (with the exceptions of \ and \'). However, the uutils implementation incorrectly attempts to validate these sequences, resulting in an "invalid sequence" error and an immediate process termination with an exit status of 125 when encountering valid but unrecognized sequences like \a or \x. This divergence from GNU behavior breaks compatibility for automated scripts and administrative workflows that rely on standard split-string semantics, leading to a local denial of service for those operations.

Severity

3.3 (Low)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-35377	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-35377	REPORT
	https://github.com/uutils/coreutils/pull/11512	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rust-coreutils",
            "binary_version": "0.0.24-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rust-coreutils",
        "purl": "pkg:deb/ubuntu/rust-coreutils@0.0.24-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.20-1",
        "0.0.22-1",
        "0.0.23-1",
        "0.0.23-2",
        "0.0.23-3",
        "0.0.24-1",
        "0.0.24-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rust-coreutils",
            "binary_version": "0.2.2-0ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "rust-coreutils",
        "purl": "pkg:deb/ubuntu/rust-coreutils@0.2.2-0ubuntu2.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.30-1",
        "0.0.30-2",
        "0.0.30-2ubuntu2",
        "0.1.0-0ubuntu1",
        "0.1.0+git20250711.2ba3a33-0ubuntu1",
        "0.1.0+git20250711.2ba3a33-0ubuntu2",
        "0.1.0+git20250711.2ba3a33-0ubuntu3",
        "0.1.0+git20250711.2ba3a33-0ubuntu4",
        "0.1.0+git20250801.cf79675-0ubuntu1",
        "0.1.0+git20250813.4af2a84-0ubuntu2",
        "0.1.0+git20250813.4af2a84-0ubuntu4",
        "0.1.0+git20250813.4af2a84-0ubuntu6",
        "0.1.0+git20250813.4af2a84-0ubuntu7",
        "0.2.2-0ubuntu1",
        "0.2.2-0ubuntu2",
        "0.2.2-0ubuntu2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rust-coreutils",
            "binary_version": "0.10.0-1ubuntu2~26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rust-coreutils",
        "purl": "pkg:deb/ubuntu/rust-coreutils@0.10.0-1ubuntu2~26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.2-0ubuntu2",
        "0.2.2-0ubuntu4",
        "0.5.0-0ubuntu1",
        "0.5.0-0ubuntu2",
        "0.6.0-0ubuntu1",
        "0.7.0-0ubuntu1",
        "0.8.0-0ubuntu3",
        "0.10.0-1ubuntu2~26.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A logic error in the env utility of uutils coreutils causes a failure to correctly parse command-line arguments when utilizing the -S (split-string) option. In GNU env, backslashes within single quotes are treated literally (with the exceptions of \\\\ and \\\u0027). However, the uutils implementation incorrectly attempts to validate these sequences, resulting in an \"invalid sequence\" error and an immediate process termination with an exit status of 125 when encountering valid but unrecognized sequences like \\a or \\x. This divergence from GNU behavior breaks compatibility for automated scripts and administrative workflows that rely on standard split-string semantics, leading to a local denial of service for those operations.",
  "id": "UBUNTU-CVE-2026-35377",
  "modified": "2026-09-21T18:36:50Z",
  "published": "2026-04-22T17:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35377"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-35377"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/uutils/coreutils/pull/11512"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-35377"
  ]
}

CVE-2026-35377 (GCVE-0-2026-35377)

Vulnerability from cvelistv5 – Published: 2026-04-22 16:09 – Updated: 2026-04-22 17:01

Title

uutils coreutils env Local Denial of Service via Improper Handling of Backslashes in Split-String Mode

Summary

A logic error in the env utility of uutils coreutils causes a failure to correctly parse command-line arguments when utilizing the -S (split-string) option. In GNU env, backslashes within single quotes are treated literally (with the exceptions of \\ and \'). However, the uutils implementation incorrectly attempts to validate these sequences, resulting in an "invalid sequence" error and an immediate process termination with an exit status of 125 when encountering valid but unrecognized sequences like \a or \x. This divergence from GNU behavior breaks compatibility for automated scripts and administrative workflows that rely on standard split-string semantics, leading to a local denial of service for those operations.

Severity

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-22 17:00 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

canonical mitre root

References

1 reference

URL	Tags
https://github.com/uutils/coreutils/pull/11512	issue-trackingpatch

Impacted products

1 product

Vendor	Product	Version
Uutils	coreutils

Credits

Zellic

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35377",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-22T17:00:56.507647Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
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    "cna": {
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          "collectionURL": "https://github.com/uutils",
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          "packageName": "coreutils",
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          ],
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          "repo": "https://github.com/uutils/coreutils",
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          "value": "A logic error in the env utility of uutils coreutils causes a failure to correctly parse command-line arguments when utilizing the -S (split-string) option. In GNU env, backslashes within single quotes are treated literally (with the exceptions of \\\\ and \\\u0027). However, the uutils implementation incorrectly attempts to validate these sequences, resulting in an \"invalid sequence\" error and an immediate process termination with an exit status of 125 when encountering valid but unrecognized sequences like \\a or \\x. This divergence from GNU behavior breaks compatibility for automated scripts and administrative workflows that rely on standard split-string semantics, leading to a local denial of service for those operations."
        }
      ],
      "impacts": [
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          "capecId": "CAPEC-153",
          "descriptions": [
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
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          "scenarios": [
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-20",
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        "discovery": "EXTERNAL"
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      "title": "uutils coreutils env Local Denial of Service via Improper Handling of Backslashes in Split-String Mode"
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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UBUNTU-CVE-2026-35377 (CVE-2026-35377)

CVE-2026-35377 (GCVE-0-2026-35377)

Tags

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