{"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"}}]}}