Vulnerability-Lookup

CVE-2026-116128 (GCVE-0-2026-116128)

Vulnerability from cvelistv5 – Published: 2026-10-30 12:46 – Updated: 2026-10-30 12:46

Title

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies

Summary

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies. The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived. A remote attacker can exhaust a worker's memory with a single request.

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 62/100 over 342 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/kazuho/Starlet/commit/f3472712…	patch
https://metacpan.org/release/KAZUHO/Starlet-0.33/…	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 0.20 , < 0.33 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Starlet"
          ],
          "packageName": "Starlet",
          "packageURL": "pkg:cpan/Starlet",
          "programFiles": [
            "lib/Starlet/Server.pm"
          ],
          "programRoutines": [
            {
              "name": "Starlet::Server::handle_connection"
            }
          ],
          "repo": "https://github.com/kazuho/Starlet",
          "versions": [
            {
              "lessThan": "0.33",
              "status": "affected",
              "version": "0.20",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.\n\nThe decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.\n\nA remote attacker can exhaust a worker\u0027s memory with a single request."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:46:30.844Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/kazuho/Starlet/commit/f3472712fff64329a43d86368768d80b61714106.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/KAZUHO/Starlet-0.33/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Starlet 0.33 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-116128",
    "datePublished": "2026-10-30T12:46:30.844Z",
    "dateReserved": "2026-10-25T10:18:33.774Z",
    "dateUpdated": "2026-10-30T12:46:30.844Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-116128",
      "date": "2026-10-31",
      "epss": "0.00239",
      "percentile": "0.1508"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "modules": [
                  "Starlet"
                ],
                "packageName": "Starlet",
                "packageURL": "pkg:cpan/Starlet",
                "programFiles": [
                  "lib/Starlet/Server.pm"
                ],
                "programRoutines": [
                  {
                    "name": "Starlet::Server::handle_connection"
                  }
                ],
                "repo": "https://github.com/kazuho/Starlet",
                "versions": [
                  {
                    "lessThan": "0.33",
                    "status": "affected",
                    "version": "0.20",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.\n\nThe decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.\n\nA remote attacker can exhaust a worker\u0027s memory with a single request."
          }
        ],
        "id": "CVE-2026-116128",
        "lastModified": "2026-10-30T17:13:54.187",
        "metrics": {},
        "published": "2026-10-30T13:18:31.293",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/kazuho/Starlet/commit/f3472712fff64329a43d86368768d80b61714106.patch"
          },
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/release/KAZUHO/Starlet-0.33/changes"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-770"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-10-31T06:00:32+00:00",
      "cve": "CVE-2026-116128",
      "id": "CVE-2026-116128",
      "initial_release_date": "2026-10-30T12:46:30.844000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "perl-starlet: Starlet: Denial of Service via unbounded buffering in chunked request decoding",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116128.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2026-116128

Vulnerability from fkie_nvd - Published: 2026-10-30 13:18 - Updated: 2026-10-30 17:13

Severity

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/kazuho/Starlet/commit/f3472712fff64329a43d86368768d80b61714106.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/KAZUHO/Starlet-0.33/changes

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Starlet"
          ],
          "packageName": "Starlet",
          "packageURL": "pkg:cpan/Starlet",
          "programFiles": [
            "lib/Starlet/Server.pm"
          ],
          "programRoutines": [
            {
              "name": "Starlet::Server::handle_connection"
            }
          ],
          "repo": "https://github.com/kazuho/Starlet",
          "versions": [
            {
              "lessThan": "0.33",
              "status": "affected",
              "version": "0.20",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.\n\nThe decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.\n\nA remote attacker can exhaust a worker\u0027s memory with a single request."
    }
  ],
  "id": "CVE-2026-116128",
  "lastModified": "2026-10-30T17:13:54.187",
  "metrics": {},
  "published": "2026-10-30T13:18:31.293",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/kazuho/Starlet/commit/f3472712fff64329a43d86368768d80b61714106.patch"
    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/KAZUHO/Starlet-0.33/changes"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-JRJQ-4H5W-6GV7

Vulnerability from github – Published: 2026-10-30 15:34 – Updated: 2026-10-30 15:34

Details

Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.

The decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.

A remote attacker can exhaust a worker's memory with a single request.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-116128"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-30T13:18:31Z",
    "severity": null
  },
  "details": "Starlet versions from 0.20 before 0.33 for Perl allow memory exhaustion via unbounded buffering when decoding chunked request bodies.\n\nThe decoder adds each read to one buffer of unconsumed input. Nothing limits the length of a chunk-size line, so a line without a CRLF grows the buffer for as long as the client keeps sending, and the read timeout restarts after every read. The data of a large chunk is also held in the buffer until the whole chunk has arrived.\n\nA remote attacker can exhaust a worker\u0027s memory with a single request.",
  "id": "GHSA-jrjq-4h5w-6gv7",
  "modified": "2026-10-30T15:34:30Z",
  "published": "2026-10-30T15:34:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116128"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kazuho/Starlet/commit/f3472712fff64329a43d86368768d80b61714106.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/KAZUHO/Starlet-0.33/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Vulnerability timeline

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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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CVE-2026-116128 (GCVE-0-2026-116128)

FKIE_CVE-2026-116128

GHSA-JRJQ-4H5W-6GV7

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