{"id":"CVE-2026-54728","summary":"bunkerweb: Improper Input Validation and Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in BunkerWeb","details":"bunkerweb is an Open-source and next-generation Web Application Firewall (WAF). Prior to BunkerWeb 1.6.12 and BunkerWeb PRO 0.57, authenticated Host header handling in the BunkerWeb UI and API improperly validated and neutralized user-controlled input in a configuration-dependent path, allowing a low-privileged authenticated user to escalate privileges and affect confidentiality, integrity, and availability of the BunkerWeb instance. This issue is fixed in BunkerWeb version 1.6.12 and BunkerWeb PRO version 0.57.","aliases":["GHSA-254j-92cv-m443"],"modified":"2026-08-12T03:51:39.096299957Z","published":"2026-07-16T19:18:17.637Z","database_specific":{"cwe_ids":["CWE-20","CWE-74"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54728.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54728.json"},{"type":"ADVISORY","url":"https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-254j-92cv-m443"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54728"},{"type":"FIX","url":"https://github.com/bunkerity/bunkerweb/commit/685ccbbe7d204132a843a7b7fd802d1bdb3f20a9"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bunkerity/bunkerweb","events":[{"introduced":"0"},{"fixed":"685ccbbe7d204132a843a7b7fd802d1bdb3f20a9"},{"fixed":"f035a1570bf38146340b2dce9161cfd63ba9a1cb"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.6.12"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.6.11","v1.6.10","v1.6.9","v1.6.6","v1.6.8","v1.6.7","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6.0","v1.5.3","v1.5.2","v1.5.0","v1.4.2","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.7","v1.2.6","v1.2.5","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54728.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N"}]}