Vulnerability-Lookup

GHSA-XFCF-WWR2-W555

Vulnerability from github – Published: 2026-05-30 18:31 – Updated: 2026-06-01 18:31

Details

Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.

Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.

A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.

Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.

Severity

6.2 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-8594"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-405"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-30T16:17:05Z",
    "severity": "MODERATE"
  },
  "details": "Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.\n\nText::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.\n\nA side effect of this is that the full input can be duplicated for each segment.  Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.\n\nNote that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.",
  "id": "GHSA-xfcf-wwr2-w555",
  "modified": "2026-06-01T18:31:47Z",
  "published": "2026-05-30T18:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8594"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hatukanezumi/Unicode-LineBreak/pull/6"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415"
    },
    {
      "type": "WEB",
      "url": "https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/30/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-8594 (GCVE-0-2026-8594)

Vulnerability from cvelistv5 – Published: 2026-05-30 15:32 – Updated: 2026-06-01 15:06

Title

Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters

Summary

Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters. Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment. A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service. Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.

Severity

6.2 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-01 15:06 UTC

CWE

CWE-405 - Asymmetric Resource Consumption (Amplification)
CWE-407 - Inefficient Algorithmic Complexity

Assigner

CPANSec redhat root Scorecard

References

4 references

URL	Tags
https://metacpan.org/release/NEZUMI/Unicode-LineB…
https://security.metacpan.org/patches/U/Unicode-L…	patch
https://github.com/hatukanezumi/Unicode-LineBreak…	issue-tracking
http://www.openwall.com/lists/oss-security/2026/05/30/6

Impacted products

1 product

Vendor	Product	Version
NEZUMI	Text::LineFold	Affected: 0 , ≤ 2019.001 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-30T18:23:34.015Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/30/6"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.2,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-8594",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T15:06:26.879298Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-01T15:06:29.639Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Unicode-LineBreak",
          "product": "Text::LineFold",
          "programFiles": [
            "lib/Text/LineFold.pm"
          ],
          "programRoutines": [
            {
              "name": "Text::LineFold::fold"
            }
          ],
          "repo": "https://github.com/hatukanezumi/Unicode-LineBreak/",
          "vendor": "NEZUMI",
          "versions": [
            {
              "lessThanOrEqual": "2019.001",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
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      ],
      "descriptions": [
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          "lang": "en",
          "value": "Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.\n\nText::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.\n\nA side effect of this is that the full input can be duplicated for each segment.  Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.\n\nNote that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module."
        }
      ],
      "impacts": [
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          "capecId": "CAPEC-130",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-130 Excessive Allocation"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-405",
              "description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
              "lang": "en",
              "type": "CWE"
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          ]
        },
        {
          "descriptions": [
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              "cweId": "CWE-407",
              "description": "CWE-407 Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-30T15:44:13.279Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/hatukanezumi/Unicode-LineBreak/pull/6"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters",
      "workarounds": [
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          "lang": "en",
          "value": "Apply the patch."
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      ],
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-8594",
    "datePublished": "2026-05-30T15:32:30.449Z",
    "dateReserved": "2026-05-14T11:54:55.248Z",
    "dateUpdated": "2026-06-01T15:06:29.639Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-XFCF-WWR2-W555

CVE-2026-8594 (GCVE-0-2026-8594)

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