high7.5
CVE-2026-54638
td has pre-auth denial of service via unbounded memory allocation in proto.UnencryptedMessage.Decode
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/gotd/td | < 0.145.1 | 0.145.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-whmm-qj9r-wvr2
- 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