gotd up to 0.145.0 Unencrypted Message Decoder unencrypted_message.go proto.UnencryptedMessage.Decode dataLen allocation of resources

Summaryinfo

A vulnerability labeled as problematic has been found in gotd td up to 0.145.0. This impacts the function proto.UnencryptedMessage.Decode of the file proto/unencrypted_message.go of the component Unencrypted Message Decoder. The manipulation of the argument dataLen results in allocation of resources. This vulnerability is known as CVE-2026-54638. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in gotd td up to 0.145.0. Affected is the function proto.UnencryptedMessage.Decode of the file proto/unencrypted_message.go of the component Unencrypted Message Decoder. The manipulation of the argument dataLen with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54638 since 06/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 0.145.1 eliminates this vulnerability.

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Productinfo

Vendor

• gotd

Name

• td

Version

• 0.145

Website

• Product: https://github.com/gotd/td/

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