CVE-2026-66902

{"id": "CVE-2026-66902", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66902", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-05T19:27:28.631315Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "affectedData": [{"repo": "https://github.com/GoogleCloudPlatform/google-auth-library-perl", "vendor": "CJCOLLIER", "product": "Google::Auth", "versions": [{"status": "affected", "version": "0", "lessThan": "0.06", "versionType": "custom"}], "packageName": "Google-Auth", "programFiles": ["lib/Google/Auth/ExternalAccountCredentials/Pluggable.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "Google::Auth::ExternalAccountCredentials::Pluggable::retrieve_subject_token"}]}]}], "published": "2026-08-04T21:16:37.253", "references": [{"url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://metacpan.org/release/CJCOLLIER/Google-Auth-0.06/diff/CJCOLLIER/Google-Auth-0.05", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "http://www.openwall.com/lists/oss-security/2026/08/04/35", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-829"}]}], "descriptions": [{"lang": "en", "value": "Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process."}, {"lang": "es", "value": "Las versiones de Google::Auth anteriores a la 0.06 para Perl ejecutan un comando especificado en un JSON de credenciales de external_account a trav\u00e9s de una llamada al sistema sin control.\n\nLa subclase Pluggable lee credential_source.executable.command del JSON de credenciales y lo ejecuta como \u2019system($command)\u2019, una llamada de un solo argumento que pasa toda la cadena a /bin/sh -c. El mapa environment_variables del ejecutable del mismo JSON se copia primero en %ENV. Ninguna compuerta de aceptaci\u00f3n protege la llamada. make_creds selecciona la subclase Pluggable siempre que credential_source.executable est\u00e9 presente, por lo que se llega a la ruta desde el flujo est\u00e1ndar de Credenciales Predeterminadas de la Aplicaci\u00f3n, incluyendo una configuraci\u00f3n \u2019type\u2019: \u2019external_account\u2019 le\u00edda del archivo especificado por GOOGLE_APPLICATION_CREDENTIALS. Las configuraciones sin credential_source.executable no seleccionan esta subclase y no llegan a la llamada.\n\nCualquier llamador que construya credenciales a partir de una configuraci\u00f3n que no controla completamente ejecuta el comando incrustado con los privilegios del proceso de la aplicaci\u00f3n."}], "lastModified": "2026-10-24T16:10:00.153", "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}