CVE-2026-54638

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54638", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-15T20:07:02.186Z", "datePublished": "2026-07-28T22:14:53.550Z", "dateUpdated": "2026-07-29T14:20:26.682Z"}, "containers": {"cna": {"title": "td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-789", "lang": "en", "description": "CWE-789: Memory Allocation with Excessive Size Value", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2"}, {"name": "https://github.com/gotd/td/issues/1711", "tags": ["x_refsource_MISC"], "url": "https://github.com/gotd/td/issues/1711"}, {"name": "https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa", "tags": ["x_refsource_MISC"], "url": "https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa"}, {"name": "https://github.com/gotd/td/releases/tag/v0.145.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/gotd/td/releases/tag/v0.145.1"}], "affected": [{"vendor": "gotd", "product": "td", "versions": [{"version": "< 0.145.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-28T22:14:53.550Z"}, "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."}], "source": {"advisory": "GHSA-whmm-qj9r-wvr2", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-29T14:20:16.425469Z", "id": "CVE-2026-54638", "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": "2026-07-29T14:20:26.682Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-54638", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-29T14:20:16.425469Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-29T14:20:22.827Z"}}], "cna": {"title": "td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode", "source": {"advisory": "GHSA-whmm-qj9r-wvr2", "discovery": "UNKNOWN"}, "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:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "gotd", "product": "td", "versions": [{"status": "affected", "version": "< 0.145.1"}]}], "references": [{"url": "https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2", "name": "https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/gotd/td/issues/1711", "name": "https://github.com/gotd/td/issues/1711", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa", "name": "https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/gotd/td/releases/tag/v0.145.1", "name": "https://github.com/gotd/td/releases/tag/v0.145.1", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-770", "description": "CWE-770: Allocation of Resources Without Limits or Throttling"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-789", "description": "CWE-789: Memory Allocation with Excessive Size Value"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-28T22:14:53.550Z"}}}, "cveMetadata": {"cveId": "CVE-2026-54638", "state": "PUBLISHED", "dateUpdated": "2026-07-29T14:20:26.682Z", "dateReserved": "2026-06-15T20:07:02.186Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-28T22:14:53.550Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "td", "vendor": "gotd", "versions": [{"status": "affected", "version": "< 0.145.1"}]}], "source": "security-advisories@github.com"}], "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 versi\u00f3n 0.145.1, proto.UnencryptedMessage.Decode en proto/unencrypted_message.go le\u00eda un dataLen controlado por el atacante de un paquete MTProto no cifrado no autenticado y asignaba make([]byte, dataLen) antes de verificar el b\u00fafer restante, lo que permit\u00eda una denegaci\u00f3n de servicio remota no autenticada a trav\u00e9s de una asignaci\u00f3n excesiva de memoria y presi\u00f3n de CPU o de recolecci\u00f3n de basura. Este problema se solucion\u00f3 en la versi\u00f3n 0.145.1."}], "id": "CVE-2026-54638", "lastModified": "2026-10-23T23:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54638", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-29T14:20:16.425469Z", "version": "2.0.3"}}]}, "published": "2026-07-28T23:17:08.617", "references": [{"source": "security-advisories@github.com", "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"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}, {"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.145.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "td", "source": "cna", "vendor": "gotd"}, "product": "td", "vendor": "gotd"}], "created": "2026-07-29T15:10:31.185389+00:00", "updated": "2026-08-03T14:15:05.541961+00:00", "vendors": ["gotd", "gotd$PRODUCT$td"]}