CVE-2026-110755

Status: Awaiting AnalysisHigh (7.5)—

Severity7.5High · CVSS 3.1

Exploitation probability0.19 %higher than 8% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

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.

CVSS

Base score: 7.5
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.19 %
Percentile among all scored CVEs: 8
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access95 %
Primary impactT1499 Endpoint Denial of Serviceimpact90 %

Vector AV:N/PR:N/UI:N; con CSV de finales de línea CR-only, la copia cuadrática del resto no analizado en getline causa consumo excesivo de CPU (A:H), según la descripción.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Filter Network Traffic Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Application Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Text CSV XS Project — Text CSV XS FOR Perl^AI

CWEs

CWE-407

References

Show 2 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-110755",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-110755",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-20T18:25:15.753382Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/cpan-authors/Text-CSV_XS",
          "modules": [
            "Text::CSV_XS"
          ],
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.65",
              "versionType": "custom"
            }
          ],
          "packageURL": "pkg:cpan/Text-CSV_XS",
          "packageName": "Text-CSV_XS",
          "programFiles": [
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          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
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              "name": "Text::CSV_XS::getline"
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  "published": "2026-10-16T23:17:00.740",
  "references": [
    {
      "url": "https://github.com/cpan-authors/Text-CSV_XS/commit/f25e00aacd6fc15857b22487cb2e5ca263f377e0.patch",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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    {
      "url": "https://metacpan.org/release/HMBRAND/Text-CSV_XS-1.65/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
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  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "description": [
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      ]
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  ],
  "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'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.\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."
    }
  ],
  "lastModified": "2026-10-20T19:17:29.850",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}