GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-7339 (GCVE-0-2025-7339)

Vulnerability from cvelistv5 – Published: 2025-07-17 15:47 – Updated: 2025-07-17 20:24
VLAI
Title
on-headers vulnerable to http response header manipulation
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.
Severity
3.4 (Low)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-17 20:24 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
jshttp on-headers Affected: 0 , < 1.1.0 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-7339",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-17T20:24:38.580125Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-17T20:24:47.447Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "on-headers",
          "vendor": "jshttp",
          "versions": [
            {
              "lessThan": "1.1.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "on-headers is a node.js middleware for listening to \u003cspan style=\"background-color: rgb(33, 40, 48);\"\u003ewhen a response writes headers.\u003c/span\u003e A bug in on-headers versions `\u0026lt;1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`.\u0026nbsp;\u003cspan style=\"background-color: rgb(24, 26, 27);\"\u003eUsers should upgrade to version 1.1.0 to receive a patch.\u0026nbsp;\u003c/span\u003eUses 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.\u003cbr\u003e"
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-241",
              "description": "CWE-241",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-17T15:47:39.680Z",
        "orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "shortName": "openjs"
      },
      "references": [
        {
          "url": "https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q"
        },
        {
          "url": "https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867"
        },
        {
          "url": "https://cna.openjsf.org/security-advisories.html"
        },
        {
          "url": "https://github.com/expressjs/morgan/issues/315"
        },
        {
          "url": "https://github.com/jshttp/on-headers/issues/15"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "on-headers vulnerable to http response header manipulation",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
    "assignerShortName": "openjs",
    "cveId": "CVE-2025-7339",
    "datePublished": "2025-07-17T15:47:39.680Z",
    "dateReserved": "2025-07-07T20:01:14.812Z",
    "dateUpdated": "2025-07-17T20:24:47.447Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-7339",
      "date": "2026-09-14",
      "epss": "0.00175",
      "percentile": "0.07201"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T01:58:55.000Z",
      "cve": "CVE-2025-7339",
      "id": "msrc_CVE-2025-7339",
      "initial_release_date": "2025-07-02T00:00:00.000Z",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "on-headers vulnerable to http response header manipulation",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-7339.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-7339\",\"sourceIdentifier\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"published\":\"2025-07-17T16:15:35.403\",\"lastModified\":\"2026-06-17T10:04:45.180\",\"vulnStatus\":\"Deferred\",\"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.\"}],\"affected\":[{\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"affectedData\":[{\"vendor\":\"jshttp\",\"product\":\"on-headers\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.1.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":3.4,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":0.8,\"impactScore\":2.5}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-07-17T20:24:38.580125Z\",\"id\":\"CVE-2025-7339\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-241\"}]}],\"references\":[{\"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\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-09-09T23:16:12+00:00",
      "cve": "CVE-2025-7339",
      "id": "CVE-2025-7339",
      "initial_release_date": "2025-07-17T15:47:39.680000+00:00",
      "product_status:fixed": "88",
      "product_status:known_affected": "100",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "on-headers: on-headers vulnerable to http response header manipulation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-7339.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T01:31:57Z",
      "cve": "CVE-2025-7339",
      "id": "CVE-2025-7339",
      "initial_release_date": "2025-07-17T23:23:54Z",
      "product_status:known_affected": "176",
      "product_status:known_not_affected": "412",
      "product_status:recommended": "1",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-7339",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-7339.json",
      "version": "17"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-7339\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-07-17T20:24:38.580125Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-07-17T20:24:42.737Z\"}}], \"cna\": {\"title\": \"on-headers vulnerable to http response header manipulation\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 3.4, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"LOW\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"jshttp\", \"product\": \"on-headers\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.1.0\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q\"}, {\"url\": \"https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867\"}, {\"url\": \"https://cna.openjsf.org/security-advisories.html\"}, {\"url\": \"https://github.com/expressjs/morgan/issues/315\"}, {\"url\": \"https://github.com/jshttp/on-headers/issues/15\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"on-headers is a node.js middleware for listening to \u003cspan style=\\\"background-color: rgb(33, 40, 48);\\\"\u003ewhen a response writes headers.\u003c/span\u003e A bug in on-headers versions `\u0026lt;1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`.\u0026nbsp;\u003cspan style=\\\"background-color: rgb(24, 26, 27);\\\"\u003eUsers should upgrade to version 1.1.0 to receive a patch.\u0026nbsp;\u003c/span\u003eUses 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.\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-241\", \"description\": \"CWE-241\"}]}], \"providerMetadata\": {\"orgId\": \"ce714d77-add3-4f53-aff5-83d477b104bb\", \"shortName\": \"openjs\", \"dateUpdated\": \"2025-07-17T15:47:39.680Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-7339\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-07-17T20:24:47.447Z\", \"dateReserved\": \"2025-07-07T20:01:14.812Z\", \"assignerOrgId\": \"ce714d77-add3-4f53-aff5-83d477b104bb\", \"datePublished\": \"2025-07-17T15:47:39.680Z\", \"assignerShortName\": \"openjs\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.