CVE-2025-5399

Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop.

There is no other way for the application to escape or exit this loop other than killing the thread/process.

This might be used to DoS libcurl-using application.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/5xxx/CVE-2025-5399.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "8.14.0"
                },
                {
                    "last_affected": "8.13.0"
                }
            ]
        }
    ],
    "cna_assigner": "curl"
}

References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type

GIT

Repo

https://github.com/curl/curl

Events

Introduced

1c3149881769e7bd79b072e48374e4c2b3678b2f

Fixed

fdb8a789d2b446b77bd7cdd2eff95f6cbc814cf4

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.13.0"
        },
        {
            "fixed": "8.14.1"
        }
    ]
}

Affected versions

Other

curl-8_13_0

curl-8_14_0

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-5399.json"