Vulnerability-Lookup

GHSA-4Q75-5W63-6HX7

Vulnerability from github – Published: 2026-10-25 18:31 – Updated: 2026-10-25 18:31

Details

Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.

For a HEAD request Starman omits chunked framing but still writes the body returned by the application, on both the array and streaming response paths. Responses with a 1xx, 204 or 304 status also carry the body.

On a keep-alive or pipelined connection the client reads those bytes as the start of the next response. A front-end proxy that reuses upstream connections may then pair responses with the wrong requests.

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-115823"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-25T17:17:01Z",
    "severity": null
  },
  "details": "Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor a HEAD request Starman omits chunked framing but still writes the body returned by the application, on both the array and streaming response paths. Responses with a 1xx, 204 or 304 status also carry the body.\n\nOn a keep-alive or pipelined connection the client reads those bytes as the start of the next response. A front-end proxy that reuses upstream connections may then pair responses with the wrong requests.",
  "id": "GHSA-4q75-5w63-6hx7",
  "modified": "2026-10-25T18:31:41Z",
  "published": "2026-10-25T18:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115823"
    },
    {
      "type": "WEB",
      "url": "https://github.com/miyagawa/Starman/commit/91c47c529cd1e100f938486896ea9083ec3ec7bf.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-115823 (GCVE-0-2026-115823)

Vulnerability from cvelistv5 – Published: 2026-10-25 16:51 – Updated: 2026-10-25 16:51

Title

Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections

Summary

Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections. For a HEAD request Starman omits chunked framing but still writes the body returned by the application, on both the array and streaming response paths. Responses with a 1xx, 204 or 304 status also carry the body. On a keep-alive or pipelined connection the client reads those bytes as the start of the next response. A front-end proxy that reuses upstream connections may then pair responses with the wrong requests.

Severity

No CVSS data available.

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 63/100 over 298 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/miyagawa/Starman/commit/91c47c…	patch
https://metacpan.org/release/MIYAGAWA/Starman-0.4…	release-notes

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 0.4019 (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Starman"
          ],
          "packageName": "Starman",
          "packageURL": "pkg:cpan/Starman",
          "programFiles": [
            "lib/Starman/Server.pm"
          ],
          "programRoutines": [
            {
              "name": "Starman::Server::_finalize_response"
            }
          ],
          "repo": "https://github.com/miyagawa/Starman",
          "versions": [
            {
              "lessThan": "0.4019",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor a HEAD request Starman omits chunked framing but still writes the body returned by the application, on both the array and streaming response paths. Responses with a 1xx, 204 or 304 status also carry the body.\n\nOn a keep-alive or pipelined connection the client reads those bytes as the start of the next response. A front-end proxy that reuses upstream connections may then pair responses with the wrong requests."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444 Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-25T16:51:19.961Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/miyagawa/Starman/commit/91c47c529cd1e100f938486896ea9083ec3ec7bf.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Starman 0.4019 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade to 0.4019, enable Plack::Middleware::Head, which removes the body from HEAD responses."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-115823",
    "datePublished": "2026-10-25T16:51:19.961Z",
    "dateReserved": "2026-10-23T16:47:20.192Z",
    "dateUpdated": "2026-10-25T16:51:19.961Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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.
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