{"api_version":"1","generated_at":"2026-08-22T18:31:25+00:00","cve":"CVE-2026-44256","urls":{"html":"https://cve.report/CVE-2026-44256","api":"https://cve.report/api/cve/CVE-2026-44256.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-44256","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-44256"},"summary":{"title":"Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username","description":"Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. 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From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. This issue is fixed in versions 4.14.6 and 5.0.0-beta2."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-117","description":"CWE-117: Improper Output Neutralization for Logs","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-19T16:21:49.920Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-c3m6-fp2h-wmr4"},{"name":"https://github.com/wazuh/wazuh/pull/35866","tags":["x_refsource_MISC"],"url":"https://github.com/wazuh/wazuh/pull/35866"},{"name":"https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926","tags":["x_refsource_MISC"],"url":"https://github.com/wazuh/wazuh/commit/cddf3fd16b0f945b28eb9c27714de3cc344e0926"},{"name":"https://github.com/wazuh/wazuh/releases/tag/v4.14.6","tags":["x_refsource_MISC"],"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.6"},{"name":"https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2","tags":["x_refsource_MISC"],"url":"https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2"}],"source":{"advisory":"GHSA-c3m6-fp2h-wmr4","discovery":"UNKNOWN"},"title":"Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-44256","datePublished":"2026-08-19T16:21:49.920Z","dateReserved":"2026-05-05T16:33:55.844Z","dateUpdated":"2026-08-19T18:18:11.834Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-19 17:18:48","lastModifiedDate":"2026-08-19 19:17:16","problem_types":["CWE-117","CWE-117 CWE-117: Improper Output Neutralization for Logs"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-19T18:17:23.310124Z","id":"CVE-2026-44256","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"44256","Ordinal":"1","Title":"Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username","CVE":"CVE-2026-44256","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"44256","Ordinal":"1","NoteData":"Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.4.0 until 4.14.6 and 5.0.0-beta2, api/api/middlewares.py decodes the Basic authentication username before credential validation and passes it to the access logger without neutralizing control characters. api/api/alogging.py interpolates that value into the plain-text API log. An unauthenticated attacker can include carriage returns or line feeds in the username to forge entries, obscure activity, or poison systems that consume the plain-text audit log. The JSON log format is not affected because JSON serialization escapes these characters. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.","Type":"Description","Title":"Wazuh: CRLF Log Injection via Unsanitized Basic-Auth Username"}]}}}