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

Vulnerability from cvelistv5 – Published: 2026-10-25 16:51 – Updated: 2026-10-25 16:51
VLAI
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
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 0.4019 (custom)
Show details on NVD website
To clipboard 

{
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-115823",
      "date": "2026-10-26",
      "epss": "0.00195",
      "percentile": "0.09054"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "modules": [
                  "Starman"
                ],
                "packageName": "Starman",
                "packageURL": "pkg:cpan/Starman",
                "programFiles": [
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                "programRoutines": [
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                "versions": [
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                    "status": "affected",
                    "version": "0",
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                  }
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            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-115823",
        "lastModified": "2026-10-26T17:13:55.323",
        "metrics": {},
        "published": "2026-10-25T17:17:01.743",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/miyagawa/Starman/commit/91c47c529cd1e100f938486896ea9083ec3ec7bf.patch"
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            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Deferred",
        "weaknesses": [
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              {
                "lang": "en",
                "value": "CWE-444"
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            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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