{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-26T15:15:08.291","vulnerabilities":[{"cve":{"id":"CVE-2025-54121","sourceIdentifier":"security-advisories@github.com","published":"2025-07-21T20:15:41.827","lastModified":"2026-06-17T09:39:29.220","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Starlette is a lightweight ASGI (Asynchronous Server Gateway Interface) framework/toolkit, designed for building async web services in Python. In versions 0.47.1 and below, when parsing a multi-part form with large files (greater than the default max spool size) starlette will block the main thread to roll the file over to disk. This blocks the event thread which means the application can't accept new connections. The UploadFile code has a minor bug where instead of just checking for self._in_memory, the logic should also check if the additional bytes will cause a rollover. The vulnerability is fixed in version 0.47.2."},{"lang":"es","value":"Starlette es un framework/kit de herramientas ASGI (Interfaz de Puerta de Enlace de Servidor Asíncrona) ligero, diseñado para crear servicios web asíncronos en Python. En las versiones 0.47.1 y anteriores, al analizar un formulario multiparte con archivos grandes (superiores al tamaño máximo de spool predeterminado), Starlette bloquea el hilo principal para que no transfiera el archivo al disco. Esto bloquea el hilo de eventos, lo que impide que la aplicación acepte nuevas conexiones. El código UploadFile presenta un pequeño error: en lugar de simplemente comprobar self._in_memory, la lógica también debería comprobar si los bytes adicionales provocarán una transferencia. Esta vulnerabilidad se corrigió en la versión 0.47.2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"encode","product":"starlette","versions":[{"version":"< 0.47.2","status":"affected"}]}]}],"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:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-07-22T19:54:16.504521Z","id":"CVE-2025-54121","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-770"}]}],"references":[{"url":"https://github.com/encode/starlette/blob/fa5355442753f794965ae1af0f87f9fec1b9a3de/starlette/datastructures.py#L436C5-L447C14","source":"security-advisories@github.com"},{"url":"https://github.com/encode/starlette/commit/9f7ec2eb512fcc3fe90b43cb9dd9e1d08696bec1","source":"security-advisories@github.com"},{"url":"https://github.com/encode/starlette/discussions/2927#discussioncomment-13721403","source":"security-advisories@github.com"},{"url":"https://github.com/encode/starlette/security/advisories/GHSA-2c2j-9gv5-cj73","source":"security-advisories@github.com"}]}}]}