CVE-2026-5078

{"id": "CVE-2026-5078", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5078", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-03T13:16:59.663217Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "affectedData": [{"vendor": "morgan", "product": "morgan", "versions": [{"status": "affected", "version": "1.2.0", "versionType": "semver", "lessThanOrEqual": "1.10.1"}, {"status": "unaffected", "version": "1.11.0", "versionType": "semver"}], "packageURL": "pkg:npm/morgan", "defaultStatus": "unaffected"}]}], "published": "2026-06-03T08:16:19.743", "references": [{"url": "https://cna.openjsf.org/security-advisories.html", "tags": ["Third Party Advisory"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}, {"url": "https://github.com/expressjs/morgan/security/advisories/GHSA-4vj7-5mj6-jm8m", "tags": ["Mitigation", "Vendor Advisory"], "source": "ce714d77-add3-4f53-aff5-83d477b104bb"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "description": [{"lang": "en", "value": "CWE-117"}]}], "descriptions": [{"lang": "en", "value": "Impact: The morgan logging middleware's :remote-user token extracts the Basic auth username from the Authorization request header and writes it to the log stream without neutralizing control characters. An unauthenticated attacker can send a crafted Authorization Basic header containing CR or LF bytes to inject forged log lines, breaking the one-request-per-line structure of access logs and enabling log forgery against downstream log consumers. The built-in combined, common, default, and short formats are affected, as well as any custom format that references :remote-user. Affected versions: morgan 1.2.0 through 1.10.1. Patches: upgrade to morgan 1.11.0, which neutralizes control characters in the :remote-user token output. Workarounds: use a custom format string that does not include :remote-user."}, {"lang": "es", "value": "Impacto: El token :remote-user del middleware de registro morgan extrae el nombre de usuario de autenticaci\u00f3n Basic del encabezado de solicitud de autorizaci\u00f3n y lo escribe en el flujo de registro sin neutralizar los caracteres de control. Un atacante no autenticado puede enviar un encabezado Authorization Basic manipulado que contiene bytes CR o LF para inyectar l\u00edneas de registro falsificadas, rompiendo la estructura de una solicitud por l\u00ednea de los registros de acceso y permitiendo la falsificaci\u00f3n de registros contra los consumidores de registros posteriores. Los formatos integrados combined, common, default y short se ven afectados, as\u00ed como cualquier formato personalizado que haga referencia a :remote-user. Versiones afectadas: morgan 1.2.0 hasta 1.10.1. Parches: actualizar a morgan 1.11.0, que neutraliza los caracteres de control en la salida del token :remote-user. Soluciones alternativas: usar una cadena de formato personalizada que no incluya :remote-user."}], "lastModified": "2026-07-22T19:10:00.120", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:morgan_project:morgan:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "BB39C2E2-D0C6-4871-944A-08DBC91BC438", "versionEndExcluding": "1.11.0", "versionStartIncluding": "1.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb"}