In PHP from 8.1.* before 8.1.32, from 8.2.* before 8.2.28, from 8.3.* before 8.3.19, from 8.4.* before 8.4.5, when receiving headers from HTTP server, the headers missing a colon (:) are treated as valid headers even though they are not. This may confuse applications into accepting invalid headers.
{
"cwe_ids": [
"CWE-20"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1734.json",
"cna_assigner": "php"
}{
"extracted_events": [
{
"introduced": "8.1.*"
},
{
"fixed": "8.1.32"
},
{
"introduced": "8.2.*"
},
{
"fixed": "8.2.28"
},
{
"introduced": "8.3.*"
},
{
"fixed": "8.3.19"
},
{
"introduced": "8.4.*"
},
{
"fixed": "8.4.5"
}
],
"source": "AFFECTED_FIELD"
}