CVE-2026-54638
HIGHtd has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/gotd/td/security/advisories/GHSA-whmm-qj9r-wvr2
X_Refsource_Misc x_refsource_misc
https://github.com/gotd/td/issues/1711
X_Refsource_Misc x_refsource_misc
https://github.com/gotd/td/commit/9d5d1f31ea5022d9798d84ccce15de2e91ba6baa
X_Refsource_Misc x_refsource_misc
https://github.com/gotd/td/releases/tag/v0.145.1
Scores
CVSS v3
7.5
EPSS
0.0035
EPSS Percentile
27.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
CWE-789
Status
published
Products (2)
gotd/td
0 - 0.145.1Go
gotd/td
< 0.145.1
Published
Jul 28, 2026
Tracked Since
Jul 29, 2026