FrankenPHP before 1.13.4 contains a denial of service vulnerability in worker mode where frankenphp_handle_request() returns false without finishing the dequeued request after a fatal error during request startup. Attackers who trigger startup fatal errors against worker scripts that keep calling frankenphp_handle_request() can leave client requests hanging indefinitely while the worker continues running.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-404"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/128xxx/CVE-2026-128018.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.13.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"fixed": "185bfe578af854d29d7bdff3dd83b3b9dea3572b"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-128018.json"
[
{
"deprecated": false,
"digest": {
"function_hash": "128252392731838530890024512152042080058",
"length": 1458
},
"id": "CVE-2026-128018-8912f03e",
"signature_type": "Function",
"signature_version": "v1",
"source": "https://github.com/php/frankenphp/commit/185bfe578af854d29d7bdff3dd83b3b9dea3572b",
"target": {
"file": "frankenphp.c",
"function": "PHP_FUNCTION"
}
},
{
"deprecated": false,
"digest": {
"line_hashes": [
"102081790753796892978593321155169629760",
"239757177678331160588390883427000646133",
"33379708922387848385859080593388841192",
"18543898512182257956765635853931870669",
"245930405389563212301735512118590373832"
],
"threshold": 0.9
},
"id": "CVE-2026-128018-e609be76",
"signature_type": "Line",
"signature_version": "v1",
"source": "https://github.com/php/frankenphp/commit/185bfe578af854d29d7bdff3dd83b3b9dea3572b",
"target": {
"file": "frankenphp.c"
}
}
]
"2026-11-14T07:04:32Z"