CVE-2026-110678 (GCVE-0-2026-110678)

Vulnerability from cvelistv5 – Published: 2026-10-19 18:11 – Updated: 2026-10-19 18:11
VLAI
Title
Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse
Summary
Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse. The parser appends each chunk to its buffer. In scalar or list context, it compares max_size with how far it has progressed, not with the buffer length. A chunk that starts with a NUL byte stops the parser before it progresses, and a call in void context skips the check, so the buffer grows without limit. A peer streaming data to an incr_parse consumer can exhaust process memory regardless of max_size.
Severity
No CVSS data available.
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 63/100 over 297 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 4.80 (custom)
Show details on NVD website
To clipboard 

{
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    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Cpanel::JSON::XS"
          ],
          "packageName": "Cpanel-JSON-XS",
          "packageURL": "pkg:cpan/Cpanel-JSON-XS",
          "programFiles": [
            "XS.xs"
          ],
          "programRoutines": [
            {
              "name": "Cpanel::JSON::XS::incr_parse"
            }
          ],
          "repo": "https://github.com/rurban/Cpanel-JSON-XS",
          "versions": [
            {
              "lessThan": "4.80",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
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      ],
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          "lang": "en",
          "value": "Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse.\n\nThe parser appends each chunk to its buffer. In scalar or list context, it compares max_size with how far it has progressed, not with the buffer length. A chunk that starts with a NUL byte stops the parser before it progresses, and a call in void context skips the check, so the buffer grows without limit.\n\nA peer streaming data to an incr_parse consumer can exhaust process memory regardless of max_size."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T18:11:58.610Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/rurban/Cpanel-JSON-XS/commit/d516f296b1714e06b0fb9eaae72f4558ae3d83d6.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Cpanel-JSON-XS 4.80 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-14T00:00:00.000Z",
          "value": "Version 4.80 released with fix."
        }
      ],
      "title": "Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-110678",
    "datePublished": "2026-10-19T18:11:58.610Z",
    "dateReserved": "2026-10-14T13:24:56.803Z",
    "dateUpdated": "2026-10-19T18:11:58.610Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-110678",
      "date": "2026-10-23",
      "epss": "0.00171",
      "percentile": "0.06176"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "modules": [
                  "Cpanel::JSON::XS"
                ],
                "packageName": "Cpanel-JSON-XS",
                "packageURL": "pkg:cpan/Cpanel-JSON-XS",
                "programFiles": [
                  "XS.xs"
                ],
                "programRoutines": [
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                    "name": "Cpanel::JSON::XS::incr_parse"
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                ],
                "repo": "https://github.com/rurban/Cpanel-JSON-XS",
                "versions": [
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                    "lessThan": "4.80",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse.\n\nThe parser appends each chunk to its buffer. In scalar or list context, it compares max_size with how far it has progressed, not with the buffer length. A chunk that starts with a NUL byte stops the parser before it progresses, and a call in void context skips the check, so the buffer grows without limit.\n\nA peer streaming data to an incr_parse consumer can exhaust process memory regardless of max_size."
          }
        ],
        "id": "CVE-2026-110678",
        "lastModified": "2026-10-19T20:50:17.967",
        "metrics": {},
        "published": "2026-10-19T19:17:21.550",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/rurban/Cpanel-JSON-XS/commit/d516f296b1714e06b0fb9eaae72f4558ae3d83d6.patch"
          },
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            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-770"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-10-20T21:08:02+00:00",
      "cve": "CVE-2026-110678",
      "id": "CVE-2026-110678",
      "initial_release_date": "2026-10-19T18:11:58.610000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "perl-Cpanel-JSON-XS: Memory exhaustion in incr_parse bypasses max_size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110678.json",
      "version": "3"
    }
  }
}



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