FKIE_CVE-2025-7339

Vulnerability from fkie_nvd - Published: 2025-07-17 16:15 - Updated: 2026-06-17 10:04
Severity
3.4 (Low) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Summary
on-headers is a node.js middleware for listening to when a response writes headers. A bug in on-headers versions `<1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`. Users should upgrade to version 1.1.0 to receive a patch. Uses are strongly encouraged to upgrade to `1.1.0`, but this issue can be worked around by passing an object to `response.writeHead()` rather than an array.
References
ce714d77-add3-4f53-aff5-83d477b104bbhttps://cna.openjsf.org/security-advisories.html
ce714d77-add3-4f53-aff5-83d477b104bbhttps://github.com/expressjs/morgan/issues/315
ce714d77-add3-4f53-aff5-83d477b104bbhttps://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867
ce714d77-add3-4f53-aff5-83d477b104bbhttps://github.com/jshttp/on-headers/issues/15
ce714d77-add3-4f53-aff5-83d477b104bbhttps://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "on-headers",
          "vendor": "jshttp",
          "versions": [
            {
              "lessThan": "1.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "on-headers is a node.js middleware for listening to when a response writes headers. A bug in on-headers versions `\u003c1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`.\u00a0Users should upgrade to version 1.1.0 to receive a patch.\u00a0Uses are strongly encouraged to upgrade to `1.1.0`, but this issue can be worked around by passing an object to `response.writeHead()` rather than an array."
    },
    {
      "lang": "es",
      "value": "on-headers es un middleware de Node.js que detecta cu\u00e1ndo una respuesta escribe encabezados. Un error en las versiones de on-headers anteriores a la 1.1.0 puede provocar que los encabezados de respuesta se modifiquen accidentalmente al pasar una matriz a `response.writeHead()`. Los usuarios deben actualizar a la versi\u00f3n 1.1.0 para recibir una correcci\u00f3n. Se recomienda encarecidamente actualizar a la versi\u00f3n 1.1.0, pero este problema se puede solucionar pasando un objeto a `response.writeHead()` en lugar de una matriz."
    }
  ],
  "id": "CVE-2025-7339",
  "lastModified": "2026-06-17T10:04:45.180",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.4,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.8,
        "impactScore": 2.5,
        "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-7339",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-07-17T20:24:38.580125Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-07-17T16:15:35.403",
  "references": [
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://github.com/expressjs/morgan/issues/315"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://github.com/jshttp/on-headers/issues/15"
    },
    {
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "url": "https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q"
    }
  ],
  "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-241"
        }
      ],
      "source": "ce714d77-add3-4f53-aff5-83d477b104bb",
      "type": "Secondary"
    }
  ]
}



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