{"id":"CVE-2026-54638","sourceIdentifier":"security-advisories@github.com","published":"2026-07-28T23:17:08.617","lastModified":"2026-10-23T23:10:00.157","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"gotd/td is a T Telegram MTProto API client in Go. Prior to 0.145.1, proto.UnencryptedMessage.Decode in proto/unencrypted_message.go read attacker controlled dataLen from an unauthenticated MTProto unencrypted packet and allocated make([]byte, dataLen) before checking the remaining buffer, allowing remote unauthenticated denial of service through excessive memory allocation and CPU or garbage collection pressure. This issue is fixed in version 0.145.1."},{"lang":"es","value":"gotd/td es un cliente API MTProto de Telegram T en Go. Antes de la versión 0.145.1, proto.UnencryptedMessage.Decode en proto/unencrypted_message.go leía un dataLen controlado por el atacante de un paquete MTProto no cifrado no autenticado y asignaba make([]byte, dataLen) antes de verificar el búfer restante, lo que permitía una denegación de servicio remota no autenticada a través de una asignación excesiva de memoria y presión de CPU o de recolección de basura. Este problema se solucionó en la versión 0.145.1."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"gotd","product":"td","versions":[{"version":"< 0.145.1","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:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-29T14:20:16.425469Z","id":"CVE-2026-54638","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-770"},{"lang":"en","value":"CWE-789"}]}],"references":[{"url":"https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa","source":"security-advisories@github.com"},{"url":"https://github.com/gotd/td/issues/1711","source":"security-advisories@github.com"},{"url":"https://github.com/gotd/td/releases/tag/v0.145.1","source":"security-advisories@github.com"},{"url":"https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2","source":"security-advisories@github.com"}]}