{"id":"CVE-2026-54638","revision":"95bd71acc3a648309fe8b84171472556","records":[{"revision":"95bd71acc3a648309fe8b84171472556","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54638","aliases":[],"title":"td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode","description":"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.","state":0,"publishedAt":"2026-07-28T22:14:53.55+00:00","modifiedAt":"2026-07-29T14:20:26.682+00:00","affected":[{"ecosystem":"Vendor product","name":"td","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gotd\",\n                    \"product\": \"td\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.145.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2","https://github.com/gotd/td/issues/1711","https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa","https://github.com/gotd/td/releases/tag/v0.145.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54638","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54638","identifiers":["CVE-2026-54638"]},"retained":false,"historicalAffected":[]}],"coverage":[]}