{"id":"CVE-2026-54728","state":"PUBLISHED","title":"bunkerweb: Improper Input Validation and Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in BunkerWeb","description":"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.","publishedAt":"2026-07-16T19:18:17.637Z","updatedAt":"2026-07-17T13:47:18.414Z","severity":{"score":6.1,"label":"Medium","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["bunkerity bunkerweb"],"affected":[{"vendor":"bunkerity","product":"bunkerweb","versions":[{"version":"< 1.6.12","status":"affected"}]}],"references":["https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-254j-92cv-m443","https://github.com/bunkerity/bunkerweb/commit/685ccbbe7d204132a843a7b7fd802d1bdb3f20a9","https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.12"],"weaknesses":["CWE-20","CWE-74"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54728.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54728","state":"PUBLISHED","datePublished":"2026-07-16T19:18:17.637Z","dateUpdated":"2026-07-17T13:47:18.414Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T23:07:33.232Z"},"containers":{"cna":{"title":"bunkerweb: Improper Input Validation and Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in BunkerWeb","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"bunkerity","product":"bunkerweb","versions":[{"version":"< 1.6.12","status":"affected"}]}],"references":[{"url":"https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-254j-92cv-m443","name":"https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-254j-92cv-m443","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/bunkerity/bunkerweb/commit/685ccbbe7d204132a843a7b7fd802d1bdb3f20a9","name":"https://github.com/bunkerity/bunkerweb/commit/685ccbbe7d204132a843a7b7fd802d1bdb3f20a9","tags":["x_refsource_MISC"]},{"url":"https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.12","name":"https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.12","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-74","lang":"en","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-16T19:18:17.637Z"},"source":{"advisory":"GHSA-254j-92cv-m443","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T13:46:58.475322Z","id":"CVE-2026-54728","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-17T13:47:18.414Z"}}]}}}