HackerOne community member Faraz Ahmed (PakCyberbot) has reported a format string injection in the Revive Adserver settings. When specific character combinations are used in a setting, the admin user console could be disabled due to a fatal PHP error.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21640.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "6"
},
{
"last_affected": "6.0.4"
}
],
"source": "AFFECTED_FIELD"
}
],
"cna_assigner": "hackerone"
}