{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-24T14:48:31.252","vulnerabilities":[{"cve":{"id":"CVE-2021-41130","sourceIdentifier":"security-advisories@github.com","published":"2021-10-07T19:15:08.843","lastModified":"2026-06-17T04:07:56.007","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Extensible Service Proxy, a.k.a. ESP is a proxy which enables API management capabilities for JSON/REST or gRPC API services. ESPv1 can be configured to authenticate a JWT token. Its verified JWT claim is passed to the application by HTTP header \"X-Endpoint-API-UserInfo\", the application can use it to do authorization. But if there are two \"X-Endpoint-API-UserInfo\" headers from the client, ESPv1 only replaces the first one, the 2nd one will be passed to the application. An attacker can send two \"X-Endpoint-API-UserInfo\" headers, the second one with a fake JWT claim. Application may use the fake JWT claim to do the authorization. This impacts following ESPv1 usages: 1) Users have configured ESPv1 to do JWT authentication with Google ID Token as described in the referenced google endpoint document. 2) Users backend application is using the info in the \"X-Endpoint-API-UserInfo\" header to do the authorization. It has been fixed by v1.58.0. You need to patch it in the following ways: * If your docker image is using tag \":1\", needs to re-start the container to pick up the new version. The tag \":1\" will automatically point to the latest version. * If your docker image tag pings to a specific minor version, e.g. \":1.57\". You need to update it to \":1.58\" and re-start the container. There are no workaround for this issue."},{"lang":"es","value":"Extensible Service Proxy, también se conoce como ESP, es un proxy que permite la administración de la API para los servicios JSON/REST o gRPC. ESPv1 puede ser configurado para autenticar un token JWT. Su reclamación JWT verificada se pasa a la aplicación mediante el encabezado HTTP \"X-Endpoint-API-UserInfo\", la aplicación puede usarla para hacer la autorización. Pero si presenta dos encabezados \"X-Endpoint-API-UserInfo\" del cliente, ESPv1 sólo reemplaza la primera, la segunda será pasada a la aplicación. Un atacante puede enviar dos encabezados \"X-Endpoint-API-UserInfo\", la segunda con una reclamación JWT falsa. La aplicación puede usar la reclamación JWT falsa para hacer la autorización. Esto afecta a los siguientes usos de ESPv1: 1) Los usuarios han configurado ESPv1 para hacer la autenticación JWT con Google ID Token como se describe en el documento de Google Endpoint referenciado. 2) La aplicación backend de los usuarios usa la información del encabezado \"X-Endpoint-API-UserInfo\" para realizar la autorización. Se ha corregido en la versión 1.58.0. Es necesario parchearlo de las siguientes maneras: * Si su imagen docker está usando la etiqueta \":1\", necesita reiniciar el contenedor para recoger la nueva versión. La etiqueta \":1\" apuntará automáticamente a la última versión. * Si la etiqueta de su imagen docker apunta a una versión menor específica, por ejemplo \":1.57\". Debe actualizarla a \":1.58\" y reiniciar el contenedor. No se presenta ninguna solución para este problema"}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"cloudendpoints","product":"esp","versions":[{"version":"< 1.58.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","baseScore":6.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.1,"impactScore":2.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.5}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:S/C:P/I:P/A:N","baseScore":4.9,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":6.8,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-290"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-290"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:google:extensible_service_proxy:*:*:*:*:*:*:*:*","versionEndExcluding":"1.58.0","matchCriteriaId":"DB5147A5-A760-4866-AA59-9D0463B68A64"}]}]}],"references":[{"url":"https://cloud.google.com/endpoints/docs/openapi/authenticating-users-google-id","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/cloudendpoints/esp/commit/e310c4f91d229a072507f80c73811489b4cdff27","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/cloudendpoints/esp/releases/tag/v1.58.0","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://github.com/cloudendpoints/esp/security/advisories/GHSA-43wx-8qmj-9r9q","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://cloud.google.com/endpoints/docs/openapi/authenticating-users-google-id","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://github.com/cloudendpoints/esp/commit/e310c4f91d229a072507f80c73811489b4cdff27","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/cloudendpoints/esp/releases/tag/v1.58.0","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://github.com/cloudendpoints/esp/security/advisories/GHSA-43wx-8qmj-9r9q","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}