CVE-2025-7339

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.

Database specific

{
    "cna_assigner": "openjs",
    "cwe_ids": [
        "CWE-241"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/7xxx/CVE-2025-7339.json"
}

References

Affected packages

Git / github.com/expressjs/morgan

Affected ranges

Type

GIT

Repo

https://github.com/expressjs/morgan

Events

Introduced

Fixed

39950b049e1eca39730cc78d45b137951597fc64

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.1.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Type

GIT

Repo

https://github.com/jshttp/on-headers

Events

Introduced

Fixed

c6e384908c9c6127d18831d16ab0bd96e1231867

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "c6e384908c9c6127d18831d16ab0bd96e1231867"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

1.*

1.0.0

1.0.1

v0.*

v0.0.0

v1.*

v1.0.0

v1.0.1

v1.0.2

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-7339.json"