CVE-2026-66901

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66901", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-28T08:28:27.249Z", "datePublished": "2026-08-04T20:49:27.643Z", "dateUpdated": "2026-08-05T19:26:51.006Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Google-Auth", "product": "Google::Auth", "programFiles": ["lib/Google/Auth/ExternalAccountCredentials.pm", "lib/Google/Auth/ServiceAccountCredentials.pm", "lib/Google/Auth/UserRefreshCredentials.pm", "lib/Google/Auth/ImpersonatedServiceAccountCredentials.pm"], "programRoutines": [{"name": "Google::Auth::ExternalAccountCredentials::retrieve_subject_token"}, {"name": "Google::Auth::ExternalAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::ServiceAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::UserRefreshCredentials::fetch_access_token"}, {"name": "Google::Auth::ImpersonatedServiceAccountCredentials::fetch_access_token"}], "repo": "https://github.com/GoogleCloudPlatform/google-auth-library-perl", "vendor": "CJCOLLIER", "versions": [{"lessThan": "0.09", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON.\n\nThe URLs the library requests are read from the credentials JSON, and their hosts were not checked against the universe domain before the request. For an external_account configuration, retrieve_subject_token fetched credential_source.url with headers from the same JSON, and fetch_access_token posted the subject token to token_url, then sent the STS access token it received to service_account_impersonation_url in an Authorization: Bearer header. The authorized_user, impersonated_service_account and service_account configurations posted the client secret and refresh token, the source access token, and a signed JWT assertion to their own JSON-supplied token_uri or impersonation URL.\n\nAny caller that builds credentials from a configuration it does not fully control issues those requests from the application's network position, reaching hosts the configuration names, including internal services and link-local metadata endpoints, and hands them the credentials each request carries. The service_account assertion is bound to aud, so it is not replayable against Google.\n\nVersion 0.06 added a _validate_url host check to the external_account class, keyed on a universe_domain read from the same credentials JSON. Version 0.07 gated a JSON-supplied universe domain behind GOOGLE_EXTERNAL_ACCOUNT_ALLOW_CUSTOM_UNIVERSES=1, deriving the pin flag from arguments that an earlier BUILDARGS pass had already merged on the make_creds path. Version 0.08 passed the pin decision through as an explicit constructor argument and moved _validate_url to Google::Auth::Credentials, adding the call to UserRefreshCredentials and ImpersonatedServiceAccountCredentials, and 0.09 added it to ServiceAccountCredentials."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "description": "CWE-918 Server-Side Request Forgery (SSRF)", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-201", "description": "CWE-201 Insertion of Sensitive Information Into Sent Data", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-08-04T20:49:27.643Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch"}, {"tags": ["patch"], "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cd42bdef53afcc4531161e85e91d0d5997e01324.patch"}, {"tags": ["patch"], "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/9b5157062acc605ca9e6c507b910587f4829ce9e.patch"}, {"tags": ["patch"], "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cbbb07804e3f8cc7cf9638ecc9c2097d80a9ef50.patch"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/CJCOLLIER/Google-Auth-0.09/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to Google-Auth 0.09 or later, which validates each URL host against googleapis.com or a universe domain pinned by the application before the request."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2026-07-28T00:00:00.000Z", "value": "Version 0.06 released with a partial fix."}, {"lang": "en", "time": "2026-08-02T00:00:00.000Z", "value": "Version 0.08 released, extending the fix to two further credential classes."}, {"lang": "en", "time": "2026-08-03T00:00:00.000Z", "value": "Version 0.09 released with the complete fix."}], "title": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON", "workarounds": [{"lang": "en", "value": "For deployments that cannot upgrade to 0.09, ensure that every credentials configuration reaching the Application Default Credentials flow comes from a trusted source."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/08/04/34"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-08-04T22:24:40.149Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-05T19:26:34.144392Z", "id": "CVE-2026-66901", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-05T19:26:51.006Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/08/04/34"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-08-04T22:24:40.149Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-66901", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-05T19:26:34.144392Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-05T19:26:47.974Z"}}], "cna": {"title": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON", "source": {"discovery": "UNKNOWN"}, "affected": [{"repo": "https://github.com/GoogleCloudPlatform/google-auth-library-perl", "vendor": "CJCOLLIER", "product": "Google::Auth", "versions": [{"status": "affected", "version": "0", "lessThan": "0.09", "versionType": "custom"}], "packageName": "Google-Auth", "programFiles": ["lib/Google/Auth/ExternalAccountCredentials.pm", "lib/Google/Auth/ServiceAccountCredentials.pm", "lib/Google/Auth/UserRefreshCredentials.pm", "lib/Google/Auth/ImpersonatedServiceAccountCredentials.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "Google::Auth::ExternalAccountCredentials::retrieve_subject_token"}, {"name": "Google::Auth::ExternalAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::ServiceAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::UserRefreshCredentials::fetch_access_token"}, {"name": "Google::Auth::ImpersonatedServiceAccountCredentials::fetch_access_token"}]}], "timeline": [{"lang": "en", "time": "2026-07-28T00:00:00.000Z", "value": "Version 0.06 released with a partial fix."}, {"lang": "en", "time": "2026-08-02T00:00:00.000Z", "value": "Version 0.08 released, extending the fix to two further credential classes."}, {"lang": "en", "time": "2026-08-03T00:00:00.000Z", "value": "Version 0.09 released with the complete fix."}], "solutions": [{"lang": "en", "value": "Upgrade to Google-Auth 0.09 or later, which validates each URL host against googleapis.com or a universe domain pinned by the application before the request."}], "references": [{"url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch", "tags": ["patch"]}, {"url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cd42bdef53afcc4531161e85e91d0d5997e01324.patch", "tags": ["patch"]}, {"url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/9b5157062acc605ca9e6c507b910587f4829ce9e.patch", "tags": ["patch"]}, {"url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cbbb07804e3f8cc7cf9638ecc9c2097d80a9ef50.patch", "tags": ["patch"]}, {"url": "https://metacpan.org/release/CJCOLLIER/Google-Auth-0.09/changes", "tags": ["release-notes"]}], "workarounds": [{"lang": "en", "value": "For deployments that cannot upgrade to 0.09, ensure that every credentials configuration reaching the Application Default Credentials flow comes from a trusted source."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}, "descriptions": [{"lang": "en", "value": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON.\n\nThe URLs the library requests are read from the credentials JSON, and their hosts were not checked against the universe domain before the request. For an external_account configuration, retrieve_subject_token fetched credential_source.url with headers from the same JSON, and fetch_access_token posted the subject token to token_url, then sent the STS access token it received to service_account_impersonation_url in an Authorization: Bearer header. The authorized_user, impersonated_service_account and service_account configurations posted the client secret and refresh token, the source access token, and a signed JWT assertion to their own JSON-supplied token_uri or impersonation URL.\n\nAny caller that builds credentials from a configuration it does not fully control issues those requests from the application's network position, reaching hosts the configuration names, including internal services and link-local metadata endpoints, and hands them the credentials each request carries. The service_account assertion is bound to aud, so it is not replayable against Google.\n\nVersion 0.06 added a _validate_url host check to the external_account class, keyed on a universe_domain read from the same credentials JSON. Version 0.07 gated a JSON-supplied universe domain behind GOOGLE_EXTERNAL_ACCOUNT_ALLOW_CUSTOM_UNIVERSES=1, deriving the pin flag from arguments that an earlier BUILDARGS pass had already merged on the make_creds path. Version 0.08 passed the pin decision through as an explicit constructor argument and moved _validate_url to Google::Auth::Credentials, adding the call to UserRefreshCredentials and ImpersonatedServiceAccountCredentials, and 0.09 added it to ServiceAccountCredentials."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-918", "description": "CWE-918 Server-Side Request Forgery (SSRF)"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-201", "description": "CWE-201 Insertion of Sensitive Information Into Sent Data"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-08-04T20:49:27.643Z"}}}, "cveMetadata": {"cveId": "CVE-2026-66901", "state": "PUBLISHED", "dateUpdated": "2026-08-05T19:26:51.006Z", "dateReserved": "2026-07-28T08:28:27.249Z", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "datePublished": "2026-08-04T20:49:27.643Z", "assignerShortName": "CPANSec"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Google-Auth", "product": "Google::Auth", "programFiles": ["lib/Google/Auth/ExternalAccountCredentials.pm", "lib/Google/Auth/ServiceAccountCredentials.pm", "lib/Google/Auth/UserRefreshCredentials.pm", "lib/Google/Auth/ImpersonatedServiceAccountCredentials.pm"], "programRoutines": [{"name": "Google::Auth::ExternalAccountCredentials::retrieve_subject_token"}, {"name": "Google::Auth::ExternalAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::ServiceAccountCredentials::fetch_access_token"}, {"name": "Google::Auth::UserRefreshCredentials::fetch_access_token"}, {"name": "Google::Auth::ImpersonatedServiceAccountCredentials::fetch_access_token"}], "repo": "https://github.com/GoogleCloudPlatform/google-auth-library-perl", "vendor": "CJCOLLIER", "versions": [{"lessThan": "0.09", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON.\n\nThe URLs the library requests are read from the credentials JSON, and their hosts were not checked against the universe domain before the request. For an external_account configuration, retrieve_subject_token fetched credential_source.url with headers from the same JSON, and fetch_access_token posted the subject token to token_url, then sent the STS access token it received to service_account_impersonation_url in an Authorization: Bearer header. The authorized_user, impersonated_service_account and service_account configurations posted the client secret and refresh token, the source access token, and a signed JWT assertion to their own JSON-supplied token_uri or impersonation URL.\n\nAny caller that builds credentials from a configuration it does not fully control issues those requests from the application's network position, reaching hosts the configuration names, including internal services and link-local metadata endpoints, and hands them the credentials each request carries. The service_account assertion is bound to aud, so it is not replayable against Google.\n\nVersion 0.06 added a _validate_url host check to the external_account class, keyed on a universe_domain read from the same credentials JSON. Version 0.07 gated a JSON-supplied universe domain behind GOOGLE_EXTERNAL_ACCOUNT_ALLOW_CUSTOM_UNIVERSES=1, deriving the pin flag from arguments that an earlier BUILDARGS pass had already merged on the make_creds path. Version 0.08 passed the pin decision through as an explicit constructor argument and moved _validate_url to Google::Auth::Credentials, adding the call to UserRefreshCredentials and ImpersonatedServiceAccountCredentials, and 0.09 added it to ServiceAccountCredentials."}, {"lang": "es", "value": "Las versiones de Google::Auth anteriores a la 0.09 para Perl permiten la falsificaci\u00f3n de solicitudes del lado del servidor y la exfiltraci\u00f3n de credenciales a trav\u00e9s de URLs no validadas tomadas del JSON de credenciales.\n\nLas URLs que la biblioteca solicita se leen del JSON de credenciales, y sus hosts no se verificaban contra el dominio del universo antes de la solicitud. Para una configuraci\u00f3n de external_account, retrieve_subject_token obten\u00eda credential_source.url con encabezados del mismo JSON, y fetch_access_token publicaba el token de sujeto en token_url, luego enviaba el token de acceso STS que recib\u00eda a service_account_impersonation_url en un encabezado Authorization: Bearer. Las configuraciones de authorized_user, impersonated_service_account y service_account publicaban el secreto del cliente y el token de actualizaci\u00f3n, el token de acceso de origen, y una aserci\u00f3n JWT firmada a su propia token_uri o URL de suplantaci\u00f3n suministrada por JSON.\n\nCualquier llamador que construye credenciales a partir de una configuraci\u00f3n que no controla completamente emite esas solicitudes desde la posici\u00f3n de red de la aplicaci\u00f3n, alcanzando hosts que la configuraci\u00f3n nombra, incluyendo servicios internos y puntos finales de metadatos link-local, y les entrega las credenciales que cada solicitud lleva. La aserci\u00f3n de service_account est\u00e1 vinculada a aud, por lo que no es reproducible contra Google.\n\nLa versi\u00f3n 0.06 a\u00f1adi\u00f3 una verificaci\u00f3n de host _validate_url a la clase external_account, basada en un universe_domain le\u00eddo del mismo JSON de credenciales. La versi\u00f3n 0.07 restringi\u00f3 un dominio de universo suministrado por JSON detr\u00e1s de GOOGLE_EXTERNAL_ACCOUNT_ALLOW_CUSTOM_UNIVERSES=1, derivando el indicador de pin de argumentos que un pase BUILDARGS anterior ya hab\u00eda fusionado en la ruta make_creds. La versi\u00f3n 0.08 pas\u00f3 la decisi\u00f3n del pin como un argumento expl\u00edcito del constructor y movi\u00f3 _validate_url a Google::Auth::Credentials, a\u00f1adiendo la llamada a UserRefreshCredentials e ImpersonatedServiceAccountCredentials, y la 0.09 la a\u00f1adi\u00f3 a ServiceAccountCredentials."}], "id": "CVE-2026-66901", "lastModified": "2026-10-24T16:10:00.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66901", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-05T19:26:34.144392Z", "version": "2.0.3"}}]}, "published": "2026-08-04T21:16:37.127", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/9b5157062acc605ca9e6c507b910587f4829ce9e.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cbbb07804e3f8cc7cf9638ecc9c2097d80a9ef50.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cd42bdef53afcc4531161e85e91d0d5997e01324.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/CJCOLLIER/Google-Auth-0.09/changes"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/08/04/34"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-201"}, {"lang": "en", "value": "CWE-918"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.09)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Google::Auth", "source": "cna", "vendor": "CJCOLLIER"}, "product": "google::auth", "vendor": "cjcollier"}], "created": "2026-08-04T22:45:03.805235+00:00", "updated": "2026-08-05T21:30:16.327920+00:00", "vendors": ["cjcollier", "cjcollier$PRODUCT$google::auth"], "weaknesses": ["CWE-201", "CWE-918"]}