CVE-2026-110755 (GCVE-0-2026-110755)

Vulnerability from cvelistv5 – Published: 2026-10-16 22:07 – Updated: 2026-10-16 22:07
VLAI
Title
Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline
Summary
Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline. With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size. A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.
Severity
No CVSS data available.
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 64/100 over 273 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 1.65 (custom)
Show details on NVD website
To clipboard 

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          "defaultStatus": "unaffected",
          "modules": [
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          ],
          "packageName": "Text-CSV_XS",
          "packageURL": "pkg:cpan/Text-CSV_XS",
          "programFiles": [
            "CSV_XS.xs"
          ],
          "programRoutines": [
            {
              "name": "Text::CSV_XS::getline"
            }
          ],
          "repo": "https://github.com/cpan-authors/Text-CSV_XS",
          "versions": [
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407 Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-16T22:07:10.643Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
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      "references": [
        {
          "tags": [
            "patch"
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          "url": "https://github.com/cpan-authors/Text-CSV_XS/commit/f25e00aacd6fc15857b22487cb2e5ca263f377e0.patch"
        },
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          "tags": [
            "release-notes"
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          "url": "https://metacpan.org/release/HMBRAND/Text-CSV_XS-1.65/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Text-CSV_XS 1.65 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-14T00:00:00.000Z",
          "value": "Fix committed to upstream repository."
        },
        {
          "lang": "en",
          "time": "2026-10-15T00:00:00.000Z",
          "value": "Version 1.65 released with fix."
        }
      ],
      "title": "Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
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  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-110755",
    "datePublished": "2026-10-16T22:07:10.643Z",
    "dateReserved": "2026-10-14T17:06:49.908Z",
    "dateUpdated": "2026-10-16T22:07:10.643Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
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        "affected": [
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              {
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                "defaultStatus": "unaffected",
                "modules": [
                  "Text::CSV_XS"
                ],
                "packageName": "Text-CSV_XS",
                "packageURL": "pkg:cpan/Text-CSV_XS",
                "programFiles": [
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                "programRoutines": [
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                    "name": "Text::CSV_XS::getline"
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                    "version": "0",
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            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline.\n\nWith eol unset, the default, getline reads with Perl\u0027s default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size.\n\nA reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input."
          }
        ],
        "id": "CVE-2026-110755",
        "lastModified": "2026-10-16T23:17:00.740",
        "metrics": {},
        "published": "2026-10-16T23:17:00.740",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/cpan-authors/Text-CSV_XS/commit/f25e00aacd6fc15857b22487cb2e5ca263f377e0.patch"
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        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Received",
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              {
                "lang": "en",
                "value": "CWE-407"
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            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-16T23:06:21+00:00",
      "cve": "CVE-2026-110755",
      "id": "CVE-2026-110755",
      "initial_release_date": "2026-10-16T22:07:10.643000+00:00",
      "product_status:known_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "perl-text-csv_xs: Text::CSV_XS: Denial of Service via crafted carriage return line endings",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110755.json",
      "version": "3"
    }
  }
}



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