{"id":"CVE-2026-21640","details":"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.","modified":"2026-07-17T03:45:54.413541807Z","published":"2026-01-20T20:48:47.940Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"6"},{"last_affected":"6.0.4"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"hackerone","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21640.json"},"references":[{"type":"WEB","url":"https://hackerone.com/reports/3445332"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21640.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21640"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/revive-adserver/revive-adserver","events":[{"introduced":"d30dee449a2da3d687c66fc4c162ed0b3e39482c"},{"last_affected":"37592f9d564b248f86b8230f5bdd53bbaa852f9e"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:aquaplatform:revive_adserver:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"6.0.0"},{"last_affected":"6.0.4"}]}}],"versions":["v6.0.4","v6.0.3","v6.0.2","v6.0.1","v6.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21640.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"}]}